HERMISTON, OR · Umatilla County

HAT ROCK 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): OR4101309
System type: Community Water System
Population served: 150
Service connections: 41
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2024 – May 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2024 – January 31, 2024
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2023 – October 17, 2023
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 10, 2023
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2021 – March 31, 2021
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2020 – September 30, 2020
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2020 – June 30, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2020 – March 31, 2020
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
LASSO
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Picloram
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Simazine
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Endothall
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Diquat
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Endrin
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Styrene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Toluene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Benzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2020 – December 31, 2022
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2020 – December 31, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
September 12, 2019 – October 17, 2019
Resolved
Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
July 22, 2019 – October 17, 2019
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2019 – September 30, 2019
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
June 18, 2019 – December 10, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2018 – November 30, 2018
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2017 – December 31, 2017
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2017 – June 30, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2017 – March 31, 2017
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2017 – March 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2016 – October 31, 2016
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2016 – September 30, 2016
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2016 – June 30, 2016
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2016 – April 30, 2016
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
July 1, 2015 – September 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2014 – November 30, 2014
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2014 – December 31, 2014
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 27, 2014 – August 10, 2017
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 2014 – June 30, 2014
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Styrene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Toluene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Benzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2014 – December 31, 2016
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2014 – December 31, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2014 – March 31, 2014
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2013 – December 31, 2013
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
August 18, 2013 – November 8, 2013
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
February 1, 1999 – February 28, 1999
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 1998 – February 28, 1998
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
July 1, 1997 – July 31, 1997
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1994 – June 30, 1994
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1992 – October 31, 1992
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1992 – October 31, 1992
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1992 – September 30, 1992
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 1992 – September 30, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1992 – July 31, 1992
Resolved

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
May 1, 2024 – May 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2023 – October 17, 2023	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2023 – July 10, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2020 – June 30, 2020	Monitoring, Regular	Nitrate	—	Resolved
March 1, 2020 – March 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	LASSO	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Picloram	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Simazine	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Endothall	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Diquat	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Endrin	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Styrene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Toluene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Benzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2020 – December 31, 2022	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
September 12, 2019 – October 17, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 22, 2019 – October 17, 2019	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2019 – September 30, 2019	Monitoring, Regular	Nitrate	—	Resolved
June 18, 2019 – December 10, 2019	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
November 1, 2018 – November 30, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2017 – December 31, 2017	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2017 – June 30, 2017	Monitoring, Regular	Nitrate	—	Resolved
March 1, 2017 – March 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
October 1, 2016 – October 31, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
April 1, 2016 – June 30, 2016	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2016 – April 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
October 1, 2015 – December 31, 2015	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
December 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 1, 2014 – November 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2014 – December 31, 2014	Monitoring, Regular	Nitrate	—	Resolved
July 27, 2014 – August 10, 2017	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2014 – June 30, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Styrene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Toluene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Benzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2014 – March 31, 2014	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
October 1, 2013 – December 31, 2013	Monitoring, Regular	Nitrate	—	Resolved
August 18, 2013 – November 8, 2013	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2012 – December 31, 2012	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
February 1, 1999 – February 28, 1999	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
February 1, 1998 – February 28, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 1997 – July 31, 1997	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1995 – September 30, 1995	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1994 – June 30, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
October 1, 1992 – October 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1992 – October 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1992 – September 30, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 1992 – September 30, 1992	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 1992 – July 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved

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

Enforcement actions

February 9, 2024State Compliance achieved1 linked violation
October 17, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved2 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved2 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved2 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved4 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved2 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved2 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved3 linked violations
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
September 7, 2023State Compliance achieved1 linked violation
July 10, 2023State Compliance achieved1 linked violation
April 29, 2021State Compliance achieved1 linked violation
December 4, 2020State Compliance achieved2 linked violations
April 10, 2020State Compliance achieved1 linked violation
December 15, 2019State Compliance achieved1 linked violation
December 11, 2019State Public Notification received1 linked violation
December 10, 2019State Compliance achieved1 linked violation
October 17, 2019State Compliance achieved1 linked violation
October 17, 2019State Compliance achieved2 linked violations
August 12, 2019State Public Notification requested1 linked violation
January 8, 2019State Compliance achieved1 linked violation
January 1, 2019State Compliance achieved2 linked violations
October 10, 2018State Compliance achieved1 linked violation
February 12, 2018State Compliance achieved1 linked violation
August 10, 2017State Compliance achieved9 linked violations
April 12, 2017State Compliance achieved1 linked violation
February 27, 2017State Public Notification requested1 linked violation
February 9, 2017State Public Notification received1 linked violation
January 17, 2017State Compliance achieved21 linked violations
November 5, 2016State Compliance achieved1 linked violation
July 27, 2016State Public Notification requested1 linked violation
July 11, 2016State Public Notification received1 linked violation
July 6, 2016State Compliance achieved1 linked violation
May 5, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 8, 2016State Public Notification received1 linked violation
February 3, 2016State Compliance achieved1 linked violation
August 18, 2015State Public Notification requested2 linked violations
April 2, 2015State Public Notification received1 linked violation
February 10, 2015State Bilateral Compliance Agreement signed11 linked violations
February 5, 2015State Compliance achieved3 linked violations
January 13, 2015State Public Notification received2 linked violations
January 13, 2015State Public Notification received1 linked violation
January 9, 2015State Compliance achieved2 linked violations
November 14, 2014State Public Notification received2 linked violations
July 25, 2014State Public Notification requested1 linked violation
April 10, 2014State Compliance achieved24 linked violations
March 18, 2014State Public Notification requested1 linked violation
March 7, 2014State Public Notification received1 linked violation
November 8, 2013State Compliance achieved1 linked violation
May 13, 2013State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
February 21, 2013State Compliance achieved1 linked violation
February 4, 2013State Violation/Reminder Notice1 linked violation
January 6, 2011State Compliance achieved2 linked violations
July 27, 2009State Violation/Reminder Notice1 linked violation
November 1, 1995State Public Notification requested1 linked violation
October 1, 1995State Public Notification received3 linked violations

Contact

HAT ROCK WATER COMPANY

209-483-2246

HERMISTON, OR 97838