Is GRASS VALLEY WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. GRASS VALLEY 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 GRASS VALLEY WATER SYSTEM’s next Consumer Confidence Report due?

GRASS VALLEY WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

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.

GRASS VALLEY, OR · Sherman County

GRASS VALLEY WATER SYSTEM Water System

Consumer Confidence Report status

GRASS VALLEY 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 GRASS VALLEY 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 Oregon’s official records. Always confirm current status with Oregon before making decisions based on this information.

System facts

System ID (PWSID): OR4100356
System type: Community Water System
Population served: 184
Service connections: 92
Ownership: local government
Water source: groundwater (wells)

GRASS VALLEY WATER SYSTEM is one of 1,168 community water systems in Oregon in the 500 or fewer people size category, serving 184 people from groundwater.

As of August 1, 2026, its federal record holds 67 entries between 1976 and 2026, all of which EPA lists as closed.

Of the 67, 58 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 synthetic organic chemicals, the Total Coliform Rules, and volatile organic chemicals.

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2026 – February 28, 2026
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2022 – August 28, 2025
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2009 – July 31, 2009
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2007 – July 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2005 – May 31, 2005
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2004 – September 30, 2004
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2004 – June 2, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2003 – November 30, 2003
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2003 – September 30, 2003
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
September 1, 2000 – September 30, 2000
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2000 – September 30, 2000
Resolved
Monitoring, Regular
—
Chlordane
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Dalapon
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Diquat
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Picloram
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Arsenic
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Nickel
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Benzene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Styrene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Toluene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
LASSO
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1999 – December 31, 2001
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1998 – May 31, 1998
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
April 1, 1998 – April 30, 1998
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
January 1, 1998 – January 31, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1997 – May 31, 1997
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
May 1, 1997 – May 31, 1997
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1995 – August 31, 1995
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1992 – September 30, 1992
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 1991 – December 31, 1991
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1991 – October 31, 1991
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1991 – September 30, 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
February 1, 2026 – February 28, 2026	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2022 – August 28, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
September 1, 2011 – September 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2009 – July 31, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2007 – July 31, 2007	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
May 1, 2005 – May 31, 2005	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate	—	Resolved
September 1, 2004 – September 30, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2004 – June 2, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate	—	Resolved
November 1, 2003 – November 30, 2003	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2003 – September 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2000 – September 30, 2000	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2000 – September 30, 2000	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Chlordane	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Dalapon	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Diquat	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Picloram	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Arsenic	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Nickel	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Benzene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Styrene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Toluene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	LASSO	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 1999 – December 31, 2001	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
May 1, 1998 – May 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1998 – April 30, 1998	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1998 – January 31, 1998	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1997 – May 31, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 1997 – May 31, 1997	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 1995 – August 31, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1992 – September 30, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 1, 1991 – December 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
October 1, 1991 – October 31, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 1991 – September 30, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	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

March 29, 2026State Compliance achieved1 linked violation
August 28, 2025State Compliance achieved1 linked violation
October 31, 2011State Violation/Reminder Notice1 linked violation
October 17, 2011State Compliance achieved1 linked violation
November 10, 2010State Compliance achieved1 linked violation
June 2, 2010Federal Compliance achieved1 linked violation
February 22, 2010State Violation/Reminder Notice1 linked violation
August 31, 2009State Violation/Reminder Notice1 linked violation
January 9, 2007State Compliance achieved2 linked violations
October 16, 2006State Compliance achieved2 linked violations
November 30, 2005State Compliance achieved1 linked violation
February 25, 2005State Compliance achieved27 linked violations
May 7, 2003State Compliance achieved28 linked violations
May 7, 2003State Compliance achieved20 linked violations
May 7, 2003State Compliance achieved6 linked violations
July 9, 2002State Compliance achieved1 linked violation
July 9, 2002State Compliance achieved1 linked violation
July 9, 2002State Compliance achieved1 linked violation
July 29, 1998State Administrative/Compliance Order with penalty issued13 linked violations
May 29, 1998State Public Notification received2 linked violations
October 7, 1997State Public Notification received4 linked violations
May 19, 1997State Public Notification received2 linked violations

Common questions

Is GRASS VALLEY WATER SYSTEM required to publish a Consumer Confidence Report?: Yes. GRASS VALLEY 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 GRASS VALLEY WATER SYSTEM’s next Consumer Confidence Report due?: GRASS VALLEY WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does GRASS VALLEY WATER SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for GRASS VALLEY 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

GRASS VALLEY WATER SYSTEM

541-333-2434

GRASS VALLEY, OR 97029