LAKE OSWEGO, OR · Clackamas County

RIVERGROVE WATER DISTRICT 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): OR4100461
System type: Community Water System
Population served: 4,000
Service connections: 1,380
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
2,4-D
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Glyphosate
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Styrene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Toluene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Benzene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
CHLOROBENZENE
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
—
Carbon tetrachloride
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
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
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
—
o-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
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
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2020 – December 31, 2020
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2017 – December 31, 2017
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2017 – December 31, 2017
Resolved
Failure to Conduct Assessment Monitoring
—
COLIPHAGE
January 1, 2017 – December 31, 2017
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2013 – December 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2012 – October 31, 2012
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
September 27, 2012 – October 18, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2012 – September 30, 2012
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2011 – December 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1998 – September 30, 1998
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1993 – June 30, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1993 – April 30, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 1993 – February 28, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 1992 – December 31, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1992 – August 31, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1992 – July 31, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1992 – June 30, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1992 – May 31, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 1992 – January 31, 1992
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 1991 – December 31, 1991
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1991 – November 30, 1991
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1991 – October 31, 1991
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 1991 – June 30, 1991
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1991 – April 30, 1991
Resolved
Monitoring, Routine Major (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

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

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzo(a)pyrene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	2,4-D	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Glyphosate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Styrene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Toluene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	CHLOROBENZENE	—	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	Carbon tetrachloride	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	1,1,1-Trichloroethane	—	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, 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	o-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, 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	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2017 – December 31, 2017	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2017 – December 31, 2017	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2017 – December 31, 2017	Failure to Conduct Assessment Monitoring	COLIPHAGE	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2012 – October 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 27, 2012 – October 18, 2012	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
September 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
September 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 1993 – June 30, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1993 – April 30, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
February 1, 1993 – February 28, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
December 1, 1992 – December 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 1992 – November 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
August 1, 1992 – August 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1992 – July 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1992 – June 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
May 1, 1992 – May 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1992 – January 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
December 1, 1991 – December 31, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 1991 – November 30, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
October 1, 1991 – October 31, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1991 – June 30, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1991 – April 30, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
February 1, 1991 – February 28, 1991	Monitoring, Routine Major (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

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

Enforcement actions

October 29, 2012State Violation/Reminder Notice42 linked violations
September 28, 1998State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 30, 1998State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 23, 1998State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 1, 1998State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 1, 1998State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 3, 1995State Compliance achieved1 linked violation
March 3, 1995State Compliance achieved1 linked violation
November 22, 1994State Public Notification received2 linked violations

Contact

RIVERGROVE WATER DISTRICT

503-635-6041

LAKE OSWEGO, OR 97035