WILSONVILLE, OR · Clackamas County

WALNUT MOBILE HOME PARK 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): OR4101223
System type: Community Water System
Population served: 200
Service connections: 57
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Source Water (GWR)
—
E. COLI
December 22, 2024 – April 7, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2024 – February 20, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – February 20, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2023 – February 13, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – February 13, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2021 – September 30, 2022
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2015 – August 26, 2018
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2012 – July 25, 2012
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2011 – December 31, 2019
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2010 – April 30, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2009 – October 31, 2009
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Styrene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
Toluene
January 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2007 – December 31, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2006 – October 31, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2005 – November 30, 2005
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2003 – October 25, 2007
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 19, 2002 – October 25, 2007
Resolved
Monitoring, Regular
—
Benzene
January 1, 2002 – December 31, 2004
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2002 – December 31, 2004
Archived
Monitoring, Regular
—
Nitrate
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Endrin
January 1, 2002 – December 31, 2004
Archived
Monitoring, Regular
—
2,4-D
January 1, 2002 – December 31, 2004
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2002 – December 31, 2004
Archived
Monitoring, Regular
—
Nitrate
January 1, 2002 – December 31, 2002
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
September 24, 2000 – December 25, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1995 – April 30, 1995
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1994 – November 14, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1994 – November 14, 1994
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1993 – September 30, 1993
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, 1992 – October 31, 1992
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1992 – October 31, 1992
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
February 1, 1992 – February 29, 1992
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1991 – March 31, 1991
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
December 22, 2024 – April 7, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2024 – February 20, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2024 – February 20, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2023 – February 13, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2023 – February 13, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2021 – September 30, 2022	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2015 – August 26, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2012 – July 25, 2012	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2011 – December 31, 2019	Monitoring, Regular	Combined Uranium	—	Resolved
April 1, 2010 – April 30, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2009 – October 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
December 1, 2007 – December 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring, Regular	Toluene	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring, Regular	Ethylbenzene	—	Resolved
October 1, 2006 – October 31, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
November 1, 2005 – November 30, 2005	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2003 – October 25, 2007	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	Resolved
October 19, 2002 – October 25, 2007	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Benzene	—	Archived
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2002 – December 31, 2002	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Endrin	—	Archived
January 1, 2002 – December 31, 2004	Monitoring, Regular	2,4-D	—	Archived
January 1, 2002 – December 31, 2004	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 2002 – December 31, 2002	Monitoring, Regular	Nitrate	—	Resolved
September 24, 2000 – December 25, 2010	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrate	—	Resolved
April 1, 1995 – April 30, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – November 14, 1994	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
September 1, 1993 – September 30, 1993	Monitoring, Routine Minor (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, 1992 – October 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1992 – October 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 1992 – February 29, 1992	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
March 1, 1991 – March 31, 1991	Monitoring, Routine Major (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

April 7, 2025State Compliance achieved1 linked violation
February 20, 2025State Compliance achieved2 linked violations
February 13, 2024State Compliance achieved2 linked violations
September 30, 2022State Compliance achieved1 linked violation
May 10, 2021State Compliance achieved1 linked violation
August 26, 2018State Compliance achieved1 linked violation
May 22, 2018State Bilateral Compliance Agreement signed2 linked violations
July 25, 2012State Compliance achieved1 linked violation
July 25, 2012State Compliance achieved1 linked violation
February 28, 2012State Violation/Reminder Notice1 linked violation
December 25, 2010State no longer subject to Rule1 linked violation
December 25, 2010State no longer subject to Rule1 linked violation
December 25, 2010State no longer subject to Rule1 linked violation
May 24, 2010State Violation/Reminder Notice1 linked violation
November 23, 2009State Violation/Reminder Notice1 linked violation
October 25, 2007State Compliance achieved6 linked violations
May 11, 2007State Compliance achieved9 linked violations
February 20, 2007State Compliance achieved6 linked violations
April 4, 2005State Compliance achieved1 linked violation
March 9, 2005State Compliance achieved7 linked violations
March 1, 2005State Compliance achieved3 linked violations
January 1, 1998State Compliance achieved2 linked violations
November 14, 1994State Compliance achieved1 linked violation
November 14, 1994State Compliance achieved1 linked violation
November 4, 1994State Formal Notice of Violation issued1 linked violation

Contact

WALNUT MOBILE HOME PARK

503-682-9002

WILSONVILLE, OR 97070