UNALASKA, AK · Aleutians West Census Area County
UNALASKA WATER SYSTEM Water System
Consumer Confidence Report status
UNALASKA WATER SYSTEM must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for UNALASKA WATER SYSTEM.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Alaska’s official records. Always confirm current status with Alaska before making decisions based on this information.
System facts
- System ID (PWSID)
- AK2260309
- System type
- Community Water System
- Population served
- 9,400
- Service connections
- 603
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
UNALASKA WATER SYSTEM is among the 15 largest community water systems in Alaska, serving 9,400 people from surface water.
As of August 1, 2026, its federal record holds 247 entries between 1979 and 2025, all of which EPA lists as closed.
Of the 247, 245 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, synthetic organic chemicals, and inorganic chemicals.
Violation history
Monitoring and Reporting (DBP)
—TTHM
October 1, 2025 – December 31, 2025
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
October 1, 2025 – December 31, 2025
ResolvedMonitoring and Reporting (DBP)
—Chlorine
May 1, 2024 – May 31, 2024
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
May 1, 2024 – May 31, 2024
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
May 1, 2024 – May 31, 2024
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2024 – December 23, 2024
ResolvedMonitoring, Regular
—Nitrate
January 1, 2024 – December 31, 2024
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2024 – December 23, 2024
ResolvedMonitoring and Reporting (DBP)
—CARBON, TOTAL
October 1, 2023 – December 31, 2023
ResolvedMonitoring and Reporting (DBP)
—CARBON, TOTAL
July 1, 2023 – September 30, 2023
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
May 1, 2022 – May 31, 2022
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
May 1, 2022 – May 31, 2022
ResolvedMonitoring and Reporting (DBP)
—Chlorine
April 1, 2022 – June 1, 2022
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
November 1, 2021 – November 30, 2021
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
May 1, 2018 – May 31, 2018
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
May 1, 2018 – May 31, 2018
ResolvedMonitoring and Reporting (DBP)
—Chlorine
April 1, 2018 – June 1, 2018
ResolvedMonitoring, Regular
—Combined Uranium
January 1, 2017 – December 31, 2025
ResolvedMonitoring, Regular
—Combined Radium (-226 and -228)
January 1, 2017 – December 31, 2025
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
January 1, 2017 – December 31, 2025
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
January 1, 2017 – December 31, 2025
ResolvedMonitoring, Regular
—Combined Uranium
January 1, 2017 – December 31, 2025
ResolvedMonitoring, Regular
—Combined Radium (-226 and -228)
January 1, 2017 – December 31, 2025
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
April 1, 2015 – April 30, 2015
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
April 1, 2015 – April 30, 2015
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
March 1, 2015 – March 31, 2015
ResolvedMonitoring and Reporting (DBP)
—Chlorine
January 1, 2015 – March 31, 2015
ResolvedMonitoring and Reporting (DBP)
—Chlorine
October 1, 2014 – December 31, 2014
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
August 1, 2014 – August 31, 2014
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
August 1, 2014 – August 31, 2014
ResolvedMonitoring and Reporting (DBP)
—Chlorine
July 1, 2014 – September 30, 2014
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
December 1, 2012 – December 31, 2012
ResolvedMonitoring and Reporting (DBP)
—Chlorine
October 1, 2012 – December 31, 2012
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
December 1, 2011 – December 31, 2011
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
July 1, 2010 – July 31, 2010
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
July 1, 2010 – July 31, 2010
ResolvedMonitoring and Reporting (DBP)
—Chlorine
July 1, 2010 – September 30, 2010
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
April 1, 2010 – April 30, 2010
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
February 1, 2010 – February 28, 2010
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
January 1, 2010 – January 31, 2010
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
December 1, 2009 – December 31, 2009
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
December 1, 2009 – December 31, 2009
ResolvedMonitoring, Regular
—Nitrate
January 1, 2009 – December 31, 2009
ResolvedMonitoring, Regular
—Nitrate
January 1, 2009 – December 31, 2009
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
August 1, 2007 – August 31, 2007
ResolvedMonitoring of Treatment (SWTR-Unfilt/GWR)
—Surface Water Treatment Rule
August 1, 2007 – August 31, 2007
ResolvedTreatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
January 1, 2004 – January 31, 2004
ResolvedTreatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
March 1, 2003 – March 31, 2003
ResolvedMonitoring, Regular
—Arsenic
January 1, 2003 – December 31, 2003
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
September 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—LASSO
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Carbofuran
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Dinoseb
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Diquat
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Endrin
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Glyphosate
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Heptachlor
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—2,3,7,8-TCDD
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Endothall
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Toxaphene
July 1, 2001 – September 30, 2001
ResolvedMonitoring, Regular
—Endothall
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Picloram
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Endrin
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Methoxychlor
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—BHC-GAMMA
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Toxaphene
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—2,4-D
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—2,4,5-TP
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—LASSO
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Atrazine
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Chlordane
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Simazine
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—2,3,7,8-TCDD
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—HEXACHLOROBENZENE
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Benzo(a)pyrene
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Dalapon
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—1,2-DIBROMO-3-CHLOROPROPANE
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Dinoseb
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Diquat
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Glyphosate
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Heptachlor
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Heptachlor epoxide
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—OXAMYL
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Pentachlorophenol
April 1, 2001 – June 30, 2001
ResolvedMonitoring, Regular
—Nitrate
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Nitrate
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Benzene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Styrene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Toluene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 1997 – December 31, 1998
ResolvedMonitoring, Regular
—Nickel
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Thallium, Total
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Beryllium, Total
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Antimony, Total
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Toluene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Styrene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Benzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Toluene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Styrene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Benzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Toluene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Styrene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—Benzene
January 1, 1994 – December 31, 1994
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 1994 – December 31, 1994
ResolvedInitial Tap Sampling for Pb and Cu
—Lead and Copper Rule
January 1, 1993 – December 15, 1998
ResolvedMonitoring, Regular
—Chromium
October 1, 1992 – September 30, 1993
ResolvedMonitoring, Regular
—Mercury
October 1, 1992 – September 30, 1993
ResolvedMonitoring, Regular
—Selenium
October 1, 1992 – September 30, 1993
ResolvedMonitoring, Regular
—Fluoride
October 1, 1992 – September 30, 1993
ResolvedMonitoring, Regular
—Barium
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Nitrate
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Mercury
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Arsenic
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Cadmium
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—DICHLOROMETHANE
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—o-Dichlorobenzene
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—Chromium
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Selenium
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Fluoride
July 1, 1991 – June 30, 1992
ArchivedMonitoring, Regular
—Benzene
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—Trichloroethylene
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—1,1,1-Trichloroethane
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—p-Dichlorobenzene
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—trans-1,2-Dichloroethylene
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—Ethylbenzene
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—1,1,2-Trichloroethane
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—CHLOROBENZENE
July 1, 1991 – September 30, 1991
ArchivedMonitoring, Regular
—Endrin
June 1, 1990 – May 31, 1993
ResolvedMonitoring, Regular
—Methoxychlor
June 1, 1990 – May 31, 1993
ResolvedMonitoring, Regular
—BHC-GAMMA
June 1, 1990 – May 31, 1993
ResolvedMonitoring, Regular
—Toxaphene
June 1, 1990 – May 31, 1993
ResolvedMonitoring, Regular
—2,4-D
June 1, 1990 – May 31, 1993
ResolvedMonitoring, Regular
—2,4,5-TP
June 1, 1990 – May 31, 1993
ResolvedMonitoring, Regular
—Fluoride
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Selenium
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Mercury
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Barium
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Fluoride
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Nitrate
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Chromium
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Arsenic
June 1, 1990 – May 31, 1991
ArchivedMonitoring, Regular
—Cadmium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Barium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Selenium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Mercury
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Fluoride
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Chromium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Cadmium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Arsenic
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Selenium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Mercury
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Chromium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Arsenic
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Nitrate
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Barium
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—Nitrate
June 30, 1988 – June 30, 1989
ResolvedMonitoring, Regular
—2,4-D
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—2,4,5-TP
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Endrin
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Methoxychlor
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—BHC-GAMMA
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Toxaphene
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Methoxychlor
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Endrin
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—2,4-D
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—2,4,5-TP
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—BHC-GAMMA
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Toxaphene
February 28, 1987 – February 28, 1990
ResolvedMonitoring, Regular
—Endrin
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Selenium
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Arsenic
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—2,4,5-TP
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—2,4-D
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Toxaphene
October 1, 1979 – October 31, 1979
ArchivedMonitoring, Regular
—Methoxychlor
October 1, 1979 – October 31, 1979
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2025 – December 31, 2025 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| October 1, 2025 – December 31, 2025 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| May 1, 2024 – May 31, 2024 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| May 1, 2024 – May 31, 2024 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| May 1, 2024 – May 31, 2024 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2024 – December 23, 2024 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2024 – December 31, 2024 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2024 – December 23, 2024 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| October 1, 2023 – December 31, 2023 | Monitoring and Reporting (DBP) | CARBON, TOTAL | — | Resolved |
| July 1, 2023 – September 30, 2023 | Monitoring and Reporting (DBP) | CARBON, TOTAL | — | Resolved |
| May 1, 2022 – May 31, 2022 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| May 1, 2022 – May 31, 2022 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| April 1, 2022 – June 1, 2022 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| November 1, 2021 – November 30, 2021 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| May 1, 2018 – May 31, 2018 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| May 1, 2018 – May 31, 2018 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| April 1, 2018 – June 1, 2018 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Combined Uranium | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Combined Uranium | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Resolved |
| April 1, 2015 – April 30, 2015 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| April 1, 2015 – April 30, 2015 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| March 1, 2015 – March 31, 2015 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| January 1, 2015 – March 31, 2015 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| October 1, 2014 – December 31, 2014 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| August 1, 2014 – August 31, 2014 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| August 1, 2014 – August 31, 2014 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 2014 – September 30, 2014 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| December 1, 2012 – December 31, 2012 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| October 1, 2012 – December 31, 2012 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| December 1, 2011 – December 31, 2011 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| July 1, 2010 – July 31, 2010 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 2010 – July 31, 2010 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| July 1, 2010 – September 30, 2010 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| April 1, 2010 – April 30, 2010 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| February 1, 2010 – February 28, 2010 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2010 – January 31, 2010 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| December 1, 2009 – December 31, 2009 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| December 1, 2009 – December 31, 2009 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| January 1, 2009 – December 31, 2009 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2009 – December 31, 2009 | Monitoring, Regular | Nitrate | — | Resolved |
| August 1, 2007 – August 31, 2007 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| August 1, 2007 – August 31, 2007 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Surface Water Treatment Rule | — | Resolved |
| January 1, 2004 – January 31, 2004 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Resolved |
| March 1, 2003 – March 31, 2003 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Resolved |
| January 1, 2003 – December 31, 2003 | Monitoring, Regular | Arsenic | — | Resolved |
| September 1, 2001 – September 30, 2001 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | LASSO | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Carbofuran | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Dinoseb | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Diquat | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Endrin | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Glyphosate | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Heptachlor | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | 2,3,7,8-TCDD | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Endothall | — | Resolved |
| July 1, 2001 – September 30, 2001 | Monitoring, Regular | Toxaphene | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Endothall | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Picloram | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Endrin | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Methoxychlor | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Toxaphene | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | 2,4-D | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | LASSO | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Atrazine | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Chlordane | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Simazine | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | 2,3,7,8-TCDD | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | HEXACHLOROBENZENE | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Dalapon | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | 1,2-DIBROMO-3-CHLOROPROPANE | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Dinoseb | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Diquat | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Glyphosate | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Heptachlor | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Heptachlor epoxide | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | OXAMYL | — | Resolved |
| April 1, 2001 – June 30, 2001 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 1997 – December 31, 1998 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Nickel | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Thallium, Total | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Beryllium, Total | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Antimony, Total | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 1993 – December 15, 1998 | Initial Tap Sampling for Pb and Cu | Lead and Copper Rule | — | Resolved |
| October 1, 1992 – September 30, 1993 | Monitoring, Regular | Chromium | — | Resolved |
| October 1, 1992 – September 30, 1993 | Monitoring, Regular | Mercury | — | Resolved |
| October 1, 1992 – September 30, 1993 | Monitoring, Regular | Selenium | — | Resolved |
| October 1, 1992 – September 30, 1993 | Monitoring, Regular | Fluoride | — | Resolved |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Barium | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Nitrate | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Mercury | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Arsenic | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Cadmium | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | DICHLOROMETHANE | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | o-Dichlorobenzene | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Chromium | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Selenium | — | Archived |
| July 1, 1991 – June 30, 1992 | Monitoring, Regular | Fluoride | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | Benzene | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | Trichloroethylene | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | p-Dichlorobenzene | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | Ethylbenzene | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Archived |
| July 1, 1991 – September 30, 1991 | Monitoring, Regular | CHLOROBENZENE | — | Archived |
| June 1, 1990 – May 31, 1993 | Monitoring, Regular | Endrin | — | Resolved |
| June 1, 1990 – May 31, 1993 | Monitoring, Regular | Methoxychlor | — | Resolved |
| June 1, 1990 – May 31, 1993 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| June 1, 1990 – May 31, 1993 | Monitoring, Regular | Toxaphene | — | Resolved |
| June 1, 1990 – May 31, 1993 | Monitoring, Regular | 2,4-D | — | Resolved |
| June 1, 1990 – May 31, 1993 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Fluoride | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Selenium | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Mercury | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Barium | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Fluoride | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Nitrate | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Chromium | — | Archived |
| June 1, 1990 – May 31, 1991 | Monitoring, Regular | Arsenic | — | Archived |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Cadmium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Barium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Selenium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Mercury | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Fluoride | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Chromium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Cadmium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Arsenic | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Selenium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Mercury | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Chromium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Arsenic | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Nitrate | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Barium | — | Resolved |
| June 30, 1988 – June 30, 1989 | Monitoring, Regular | Nitrate | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | 2,4-D | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | Endrin | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | Methoxychlor | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | Toxaphene | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | Methoxychlor | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | Endrin | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | 2,4-D | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| February 28, 1987 – February 28, 1990 | Monitoring, Regular | Toxaphene | — | Resolved |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Endrin | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Selenium | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Arsenic | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | 2,4,5-TP | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | 2,4-D | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Toxaphene | — | Archived |
| October 1, 1979 – October 31, 1979 | Monitoring, Regular | Methoxychlor | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- March 12, 2026State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- March 11, 2026State Compliance achieved6 linked violations
- January 26, 2026State Compliance achieved2 linked violations
- January 8, 2026State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- January 6, 2026State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- December 9, 2025State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- November 5, 2025State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- July 16, 2025State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- June 5, 2025State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- May 13, 2025State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- April 21, 2025State Compliance achieved1 linked violation
- December 23, 2024State Compliance achieved2 linked violations
- September 25, 2024State Compliance Meeting conducted1 linked violation
- August 9, 2024State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- June 24, 2024State Compliance achieved1 linked violation
- June 24, 2024State Compliance achieved1 linked violation
- June 24, 2024State Compliance achieved1 linked violation
- June 11, 2024State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- March 19, 2024State Compliance achieved2 linked violations
- November 17, 2023State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 7, 2023State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- July 31, 2023State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- July 31, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
- July 31, 2023State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
- July 31, 2023State Boil Water Ordergeneral compliance action — not tied to a specific violation on record
- June 20, 2023State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- May 3, 2023State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- November 17, 2022State Compliance achieved1 linked violation
- July 14, 2022State Compliance achieved2 linked violations
- June 1, 2022State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- June 1, 2022State Compliance achieved1 linked violation
- April 14, 2022State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- October 14, 2021State Boil Water Ordergeneral compliance action — not tied to a specific violation on record
- June 30, 2021State Boil Water Ordergeneral compliance action — not tied to a specific violation on record
- September 5, 2019State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- September 4, 2019State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 27, 2019State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- May 13, 2019State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- April 26, 2019State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- April 26, 2019State Boil Water Ordergeneral compliance action — not tied to a specific violation on record
- January 7, 2019State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- December 12, 2018State Compliance Meeting conducted2 linked violations
- August 13, 2018State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 10, 2018State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- July 9, 2018State Compliance achieved1 linked violation
- June 1, 2018State Compliance achieved1 linked violation
- June 1, 2018State Compliance achieved1 linked violation
- October 30, 2017State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- September 6, 2017State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- March 25, 2016State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- December 29, 2015State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- October 14, 2015State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- August 4, 2015State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- May 31, 2015State Compliance achieved4 linked violations
- February 23, 2015State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- January 1, 2015State Compliance achieved1 linked violation
- October 10, 2014State Compliance achieved2 linked violations
- September 22, 2014State Compliance achieved1 linked violation
- September 4, 2014State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- June 9, 2014State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- September 11, 2013State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 15, 2013State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 15, 2013State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 5, 2013State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- May 16, 2013State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- January 28, 2013State Compliance achieved2 linked violations
- December 11, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- August 28, 2012State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
- June 7, 2012State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- May 30, 2012State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- May 4, 2012State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- February 2, 2012State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- January 31, 2012State Compliance achieved1 linked violation
- January 11, 2012State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- November 18, 2010State Compliance achieved1 linked violation
- November 5, 2010State Compliance achieved15 linked violations
- July 22, 2010State Compliance achieved2 linked violations
- December 9, 2009State Compliance Meeting conducted1 linked violation
- September 22, 2009State Compliance achieved1 linked violation
- February 17, 2006State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- October 4, 2004State Violation/Reminder Notice4 linked violations
- December 11, 2001State Other1 linked violation
- October 25, 2001State Othergeneral compliance action — not tied to a specific violation on record
- August 30, 2001State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- August 22, 2001State Othergeneral compliance action — not tied to a specific violation on record
- August 15, 2001State Compliance achieved29 linked violations
- July 19, 2001State Compliance achieved2 linked violations
- May 29, 2001State Other2 linked violations
- April 11, 2001State Other1 linked violation
- April 4, 2001State Othergeneral compliance action — not tied to a specific violation on record
- February 23, 2001State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- December 12, 2000State Othergeneral compliance action — not tied to a specific violation on record
- November 17, 2000State Compliance Meeting conductedgeneral compliance action — not tied to a specific violation on record
- June 16, 2000State Other1 linked violation
- June 15, 2000State Other1 linked violation
- June 9, 2000State Other1 linked violation
- March 1, 2000State Compliance achieved19 linked violations
- July 1, 1999State Other1 linked violation
- April 15, 1999State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- April 9, 1999State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- April 5, 1999State Othergeneral compliance action — not tied to a specific violation on record
- March 24, 1999State Othergeneral compliance action — not tied to a specific violation on record
- December 15, 1998State Compliance achieved79 linked violations
- December 10, 1998State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- December 9, 1998State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- April 20, 1998State Othergeneral compliance action — not tied to a specific violation on record
- March 19, 1998State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- May 9, 1997State Othergeneral compliance action — not tied to a specific violation on record
- May 6, 1997State Othergeneral compliance action — not tied to a specific violation on record
- August 17, 1996State Violation/Reminder Notice1 linked violation
- August 16, 1996State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- August 15, 1995State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- August 13, 1993State Othergeneral compliance action — not tied to a specific violation on record
- November 14, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- June 23, 1991State Compliance achieved28 linked violations
- January 24, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- October 12, 1989State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
Common questions
Is UNALASKA WATER SYSTEM required to publish a Consumer Confidence Report?
- Yes. UNALASKA WATER SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is UNALASKA WATER SYSTEM’s next Consumer Confidence Report due?
- UNALASKA WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does UNALASKA WATER SYSTEM have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for UNALASKA WATER SYSTEM.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
HERNANDEZ, ERIK_OP2
907-581-1260
UNALASKA, AK 99685