ENTERPRISE, OR · Wallowa County

WALLOWA LAKE CO SERVICE DIST 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): OR4101420
System type: Community Water System
Population served: 350
Service connections: 288
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2025 – October 31, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2025 – September 30, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2024 – July 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2024 – April 30, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2023 – December 31, 2023
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2023 – September 11, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2023 – August 31, 2023
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2023 – December 31, 2023
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2019 – August 7, 2020
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2018 – March 31, 2018
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
October 1, 2017 – December 31, 2017
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
February 4, 2017 – February 6, 2017
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2017 – October 27, 2016
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2017 – December 31, 2025
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2017 – March 31, 2017
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
July 1, 2016 – September 30, 2016
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 2016 – September 30, 2016
Resolved
Monitoring, Regular
—
Combined Uranium
July 1, 2016 – September 30, 2016
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 17, 2013 – December 9, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2008 – December 31, 2016
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2008 – December 31, 2016
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2007 – July 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2006 – August 31, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2002 – July 31, 2002
Resolved
Monitoring, Regular
—
Styrene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Toluene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2002 – June 4, 2004
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2002 – June 4, 2004
Resolved
Monitoring, Regular
—
Chromium
January 1, 2002 – June 4, 2004
Resolved
Monitoring, Regular
—
Barium
January 1, 2002 – June 4, 2004
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
August 1, 1998 – August 31, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1998 – August 31, 1998
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
June 1, 1998 – June 30, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1998 – June 30, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1998 – May 31, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 1998 – March 31, 1998
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1997 – December 31, 1997
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1996 – April 20, 2005
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 1996 – December 31, 1999
Resolved
Monitoring, Regular
—
Nitrite
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1996 – December 31, 1996
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1994 – April 14, 1995
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1994 – November 14, 1994
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
October 1, 2025 – October 31, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2025 – September 30, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2024 – July 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2024 – April 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2023 – December 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2023 – September 11, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
August 1, 2023 – August 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2019 – August 7, 2020	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2018 – March 31, 2018	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
October 1, 2017 – December 31, 2017	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2017 – June 30, 2017	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
February 4, 2017 – February 6, 2017	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2017 – October 27, 2016	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2017 – December 31, 2025	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
January 1, 2017 – March 31, 2017	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
July 1, 2016 – September 30, 2016	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
July 1, 2016 – September 30, 2016	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
July 1, 2016 – September 30, 2016	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 17, 2013 – December 9, 2013	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
September 1, 2011 – September 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 2009 – March 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2008 – December 31, 2016	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2008 – December 31, 2016	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
July 1, 2007 – July 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 2006 – August 31, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	Resolved
September 1, 2002 – September 30, 2002	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2002 – July 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Styrene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Toluene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2002 – June 4, 2004	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2002 – June 4, 2004	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2002 – June 4, 2004	Monitoring, Regular	Chromium	—	Resolved
January 1, 2002 – June 4, 2004	Monitoring, Regular	Barium	—	Resolved
August 1, 1998 – August 31, 1998	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 1998 – August 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 1998 – June 30, 1998	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 1998 – June 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 1998 – May 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 1998 – March 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Nitrate	—	Resolved
October 1, 1996 – April 20, 2005	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 1996 – December 31, 1999	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Nitrite	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1994 – April 14, 1995	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1994 – November 14, 1994	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved

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

Enforcement actions

December 8, 2025State Compliance achieved2 linked violations
September 11, 2024State Compliance achieved1 linked violation
June 7, 2024State Compliance achieved2 linked violations
March 7, 2024State Compliance achieved2 linked violations
February 4, 2024State Compliance achieved1 linked violation
July 23, 2019State Compliance achieved2 linked violations
February 6, 2017State Compliance achieved2 linked violations
October 31, 2011State Violation/Reminder Notice2 linked violations
June 29, 2009State Compliance achieved22 linked violations
April 20, 2005State Compliance achieved1 linked violation
April 20, 2005State Compliance achieved1 linked violation
April 18, 2005State Compliance achieved3 linked violations
September 7, 2004State Compliance achieved3 linked violations
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved2 linked violations
June 4, 2004State Compliance achieved2 linked violations
June 4, 2004State Compliance achieved3 linked violations
June 4, 2004State Compliance achieved9 linked violations
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved2 linked violations
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved2 linked violations
June 4, 2004State Compliance achieved1 linked violation
June 4, 2004State Compliance achieved1 linked violation
April 2, 1998State Public Notification received3 linked violations
April 14, 1995State Compliance achieved1 linked violation
November 14, 1994State Compliance achieved1 linked violation

Contact

WALLOWA LAKE CO SERVICE DIST

541-263-1533

ENTERPRISE, OR 97828