SANDY, OR · Clackamas County

WELCHES WATER COMPANY Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Oregon’s official records. Always confirm current status with Oregon before making decisions based on this information.

System facts

System ID (PWSID): OR4100937
System type: Community Water System
Population served: 60
Service connections: 118
Ownership: local government
Water source: groundwater (wells)

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2025 – July 29, 2025
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2025 – December 31, 2025
Archived
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2024 – January 28, 2025
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2024 – December 31, 2024
Archived
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2024 – December 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2024 – December 31, 2024
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2024 – December 31, 2024
Archived
Monitoring, Source Water (GWR)
—
E. COLI
April 4, 2023 – April 10, 2023
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Xylenes, Total
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Chlordane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Pentachlorophenol
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
2,4,5-TP
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Heptachlor
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
LASSO
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Atrazine
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Dinoseb
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Picloram
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Simazine
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
OXAMYL
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Dalapon
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Methoxychlor
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
BHC-GAMMA
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Endrin
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Styrene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
Archived
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2022 – December 31, 2022
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2022 – December 31, 2022
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2022 – December 31, 2022
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2021 – September 30, 2022
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2021 – September 30, 2022
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2021 – December 31, 2021
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2021 – December 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2020 – September 30, 2020
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2020 – August 12, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2020 – April 30, 2020
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2020 – December 31, 2022
Archived
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2020 – December 31, 2020
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Xylenes, Total
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Benzene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Toluene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Styrene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
BHC-GAMMA
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Methoxychlor
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Toxaphene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Dalapon
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Diquat
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Endothall
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Glyphosate
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
OXAMYL
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Simazine
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Picloram
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Dinoseb
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Atrazine
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
LASSO
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Heptachlor
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
2,4-D
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Pentachlorophenol
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2020 – December 31, 2022
Archived
Monitoring, Regular
—
Chlordane
January 1, 2020 – December 31, 2022
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2020 – August 12, 2020
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2019 – August 12, 2020
Resolved
OCCT/SOWT Treatment Installation/Demonstration
Health-based
Lead and Copper Rule
April 1, 2018 – December 26, 2018
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2017 – October 4, 2017
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2017 – December 31, 2025
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2017 – December 31, 2025
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2017 – December 31, 2025
Archived
Public Education
Health-based
Lead and Copper Rule
December 11, 2016 – March 9, 2017
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
February 17, 2016 – April 17, 2017
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2016 – February 29, 2016
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 26, 2014 – December 12, 2014
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 24, 2014 – December 12, 2014
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 2, 2014 – December 12, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2014 – October 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2014 – September 30, 2014
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
August 27, 2014 – December 12, 2014
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
July 23, 2014 – December 12, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2014 – July 31, 2014
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
January 2, 2014 – December 12, 2014
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
November 20, 2013 – December 12, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2013 – October 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2013 – June 30, 2013
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
March 15, 2013 – April 15, 2013
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
February 1, 2013 – February 28, 2013
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
January 23, 2013 – April 15, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2013 – January 31, 2013
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2013 – September 30, 2013
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2011 – December 31, 2011
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 19, 2002 – March 11, 2003
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
LASSO
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Picloram
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Endothall
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Diquat
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Endrin
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Styrene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Toluene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Benzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
December 1, 1995 – December 31, 1995
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1991 – October 31, 1991
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
February 1, 1991 – February 28, 1991
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 1, 1976 – May 31, 1980
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
June 1, 1976 – May 31, 1980
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
July 1, 2025 – July 29, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2025 – December 31, 2025	Monitoring, Regular	Nitrate	—	Archived
October 1, 2024 – January 28, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2024 – December 31, 2024	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Archived
January 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2024 – December 31, 2024	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Archived
April 4, 2023 – April 10, 2023	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Xylenes, Total	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Chlordane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Pentachlorophenol	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzo(a)pyrene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	2,4,5-TP	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Heptachlor epoxide	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Heptachlor	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	LASSO	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Atrazine	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Dinoseb	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Picloram	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Simazine	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	OXAMYL	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Dalapon	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Methoxychlor	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	BHC-GAMMA	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Endrin	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Styrene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2022 – December 31, 2022	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2022 – December 31, 2022	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
October 1, 2021 – September 30, 2022	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2021 – September 30, 2022	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2021 – December 31, 2021	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2021 – December 31, 2021	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
September 1, 2020 – September 30, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – August 12, 2020	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 2020 – April 30, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Carbofuran	—	Archived
January 1, 2020 – December 31, 2020	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2020 – December 31, 2020	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Xylenes, Total	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Benzene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Toluene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Styrene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	BHC-GAMMA	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Methoxychlor	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Toxaphene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Dalapon	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Diquat	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Endothall	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Glyphosate	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	OXAMYL	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Simazine	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Picloram	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Dinoseb	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Atrazine	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	LASSO	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Heptachlor	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Heptachlor epoxide	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	2,4-D	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	HEXACHLOROBENZENE	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Benzo(a)pyrene	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Pentachlorophenol	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Archived
January 1, 2020 – December 31, 2022	Monitoring, Regular	Chlordane	—	Archived
January 1, 2020 – August 12, 2020	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2019 – August 12, 2020	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 2018 – December 26, 2018	OCCT/SOWT Treatment Installation/Demonstration	Lead and Copper Rule	Health-based	Resolved
July 1, 2017 – October 4, 2017	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2017 – December 31, 2025	Monitoring, Regular	Combined Uranium	—	Archived
January 1, 2017 – December 31, 2025	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
January 1, 2017 – December 31, 2025	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
December 11, 2016 – March 9, 2017	Public Education	Lead and Copper Rule	Health-based	Resolved
February 17, 2016 – April 17, 2017	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
February 1, 2016 – February 29, 2016	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 26, 2014 – December 12, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 24, 2014 – December 12, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 2, 2014 – December 12, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2014 – October 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 27, 2014 – December 12, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 23, 2014 – December 12, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2014 – July 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 2, 2014 – December 12, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
November 20, 2013 – December 12, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2013 – October 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 15, 2013 – April 15, 2013	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
February 1, 2013 – February 28, 2013	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
January 23, 2013 – April 15, 2013	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2013 – January 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2013 – September 30, 2013	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring, Regular	Nitrate	—	Resolved
October 19, 2002 – March 11, 2003	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	LASSO	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Picloram	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Endothall	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Diquat	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Endrin	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Styrene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Toluene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Benzene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Trichloroethylene	—	Resolved
December 1, 1995 – December 31, 1995	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 1992 – November 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 1992 – November 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1991 – October 31, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
February 1, 1991 – February 28, 1991	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1976 – May 31, 1980	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
June 1, 1976 – May 31, 1980	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

October 10, 2025State Compliance achieved2 linked violations
July 29, 2025State Compliance achieved1 linked violation
January 28, 2025State Compliance achieved1 linked violation
September 26, 2024State Compliance achieved1 linked violation
October 17, 2023State Compliance achieved2 linked violations
April 10, 2023State Compliance achieved1 linked violation
March 8, 2023State Compliance achieved6 linked violations
March 3, 2023State Compliance achieved1 linked violation
January 5, 2022State Compliance achieved1 linked violation
January 5, 2022State Compliance achieved1 linked violation
July 13, 2021State Compliance achieved2 linked violations
December 9, 2020State Compliance achieved1 linked violation
October 8, 2020State Compliance achieved1 linked violation
August 12, 2020State Compliance achieved1 linked violation
August 12, 2020State Compliance achieved1 linked violation
August 12, 2020State Compliance achieved2 linked violations
May 22, 2020State Compliance achieved1 linked violation
December 26, 2018State Compliance achieved1 linked violation
August 20, 2018State Compliance achieved1 linked violation
April 16, 2018State Public Notification requested1 linked violation
October 4, 2017State Compliance achieved1 linked violation
April 17, 2017State Compliance achieved2 linked violations
March 9, 2017State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 9, 2017State Compliance achieved1 linked violation
April 6, 2016State Compliance achieved3 linked violations
March 18, 2016State Public Notification requested1 linked violation
December 12, 2014State Compliance achieved10 linked violations
December 12, 2014State Compliance achieved1 linked violation
December 12, 2014State Compliance achieved2 linked violations
December 12, 2014State Compliance achieved1 linked violation
September 23, 2014State Public Notification requested3 linked violations
January 24, 2014State Public Notification received4 linked violations
January 13, 2014State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 19, 2013State Compliance achieved1 linked violation
December 19, 2013State Compliance achieved1 linked violation
November 4, 2013State Public Notification received1 linked violation
November 4, 2013State Public Notification received1 linked violation
October 11, 2013State Public Notification requested2 linked violations
September 30, 2013State Compliance achieved1 linked violation
July 25, 2013State Public Notification received3 linked violations
April 15, 2013State Compliance achieved2 linked violations
April 15, 2013State Compliance achieved5 linked violations
March 18, 2013State Public Notification requested2 linked violations
February 28, 2012State Violation/Reminder Notice2 linked violations
January 27, 2012State Compliance achieved2 linked violations
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved1 linked violation
September 14, 2006State Compliance achieved3 linked violations
September 14, 2006State Compliance achieved18 linked violations
September 14, 2006State Compliance achieved1 linked violation
August 9, 2001State Compliance achieved1 linked violation
August 9, 2001State Compliance achieved2 linked violations
August 9, 2001State Compliance achieved1 linked violation
August 9, 2001State Compliance achieved1 linked violation
August 9, 2001State Compliance achieved1 linked violation

Contact

WELCHES WATER COMPANY

503-806-4734

SANDY, OR 97055