WALLOWA, CITY OF

Oregon — Community Water System — PWSID: OR4100930

System Information

PWSID	OR4100930
System Name	WALLOWA, CITY OF
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	10
Serves School	No
Wholesaler	No
First Reported	Mar 12, 1979
Last Reported	Dec 23, 2025

Location & Contact

State	Oregon
City	WALLOWA
ZIP Code	97885
Address	PO BOX 487
Organization	WALLOWA, CITY OF
Phone	541-886-2422

Population & Service

Population Served	840
Service Connections	468

Drinking Water Violations (44)

This water system has 44 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jul 1, 2025	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Aug 27, 2025	Consumer Confidence Rule
Jul 1, 2024	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 30, 2024	Consumer Confidence Rule
Jul 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 14, 2023	Consumer Confidence Rule
Jan 1, 2021	Dec 31, 2021	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2021	Nitrate Rule
Feb 1, 2020	Feb 29, 2020	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Feb 29, 2020	Revised Total Coliform Rule
Jan 1, 2020	Jan 31, 2020	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jan 31, 2020	Revised Total Coliform Rule
Jan 1, 2017	Dec 31, 2019	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Dec 31, 2019	Nitrate Rule
Aug 1, 2016	Aug 31, 2016	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Aug 31, 2016	Revised Total Coliform Rule
Jul 1, 2015	Jul 31, 2015	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jul 31, 2015	Total Coliform Rule
Jul 1, 2015	Jul 31, 2015	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jul 31, 2015	Total Coliform Rule
Jul 1, 2015	Jul 31, 2015	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jul 31, 2015	Total Coliform Rule
Jan 1, 2008	Dec 31, 2008	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2008	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Oct 19, 2004	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Apr 22, 2010	Consumer Confidence Rule
Jul 1, 2004	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Apr 22, 2010	Consumer Confidence Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Oct 19, 2003	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Feb 27, 2004	Consumer Confidence Rule
Jul 1, 2003	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Apr 22, 2010	Consumer Confidence Rule
Jan 1, 2003	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Oct 19, 2002	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Mar 24, 2003	Consumer Confidence Rule
Oct 19, 2001	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Mar 24, 2003	Consumer Confidence Rule
Sep 16, 2001	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Jul 1, 2001	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jun 24, 2002	Consumer Confidence Rule
Oct 1, 2000	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Mar 24, 2003	Consumer Confidence Rule
Oct 19, 1999	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Aug 28, 2000	Consumer Confidence Rule
Jan 1, 1997	Dec 31, 1997	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1997	Nitrate Rule
Jan 1, 1997	Dec 31, 1997	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1997	Nitrate Rule
Jan 1, 1996	Dec 31, 1999	Gross Alpha, Excl. Radon and U	MR	No	Yes	—	15 pCi/L	—	Resolved	Dec 31, 1999	Radionuclides and Revised Rad Rule
Jan 1, 1996	Dec 31, 1999	Gross Alpha, Excl. Radon and U	MR	No	Yes	—	15 pCi/L	—	Resolved	Dec 31, 1999	Radionuclides and Revised Rad Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Aug 1, 1994	Aug 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 1994	Total Coliform Rule
Jul 1, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Jul 1, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Jul 1, 1994	Jul 31, 1994	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jul 31, 1994	Total Coliform Rule
Jan 1, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Jan 1, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 6, 2011	Lead and Copper Rule
Nov 1, 1993	Nov 30, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1993	Total Coliform Rule
Oct 1, 1993	Oct 31, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 1993	Total Coliform Rule
Nov 1, 1991	Nov 30, 1991	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1991	Total Coliform Rule
Nov 1, 1991	Nov 30, 1991	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Nov 30, 1991	Total Coliform Rule
Jun 1, 1976	May 31, 1980	Combined Radium (-226 and -228)	MR	No	No	—	5 pCi/L	—	Archived	May 31, 1980	Radionuclides and Revised Rad Rule
Jun 1, 1976	May 31, 1980	Gross Alpha, Excl. Radon and U	MR	No	No	—	15 pCi/L	—	Archived	May 31, 1980	Radionuclides and Revised Rad Rule
—	—		—	No	No	—	—	—	—	—	—

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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