UNION, CITY OF

Oregon — Community Water System — PWSID: OR4100915

System Information

PWSID	OR4100915
System Name	UNION, 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	UNION
ZIP Code	97883
Address	PO BOX 529
Organization	UNION, CITY OF
Phone	541-910-9399

Population & Service

Population Served	2,162
Service Connections	958

Drinking Water Violations (25)

This water system has 25 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
Oct 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Nov 1, 2023	Consumer Confidence Rule
Jul 1, 2023	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Nov 1, 2023	Consumer Confidence Rule
Jun 1, 2020	Jun 30, 2020	Revised Total Coliform Rule	MON	No	No	—	—	—	Resolved	Jun 30, 2020	Revised Total Coliform Rule
Sep 18, 2015	—	Public Notice	Other	No	No	—	—	—	Resolved	Oct 22, 2015	Public Notice Rule and Revised PN 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
Mar 1, 2011	Mar 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 2011	Total Coliform Rule
Mar 1, 2011	Mar 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 2011	Total Coliform Rule
Jan 1, 2002	Dec 31, 2002	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2002	Nitrate Rule
Jan 1, 2000	Dec 31, 2000	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2000	Nitrate Rule
Jun 1, 1999	Jun 30, 1999	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 1999	Total Coliform Rule
Jun 1, 1999	Jun 30, 1999	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 1999	Total Coliform Rule
Apr 1, 1997	Apr 30, 1997	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 1997	Total Coliform Rule
Apr 1, 1997	Apr 30, 1997	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 1997	Total Coliform Rule
Jan 1, 1997	Dec 31, 1997	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1997	Nitrate Rule
Nov 1, 1996	Nov 30, 1996	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1996	Total Coliform Rule
Mar 1, 1996	Mar 31, 1996	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 1996	Total Coliform Rule
Mar 1, 1996	Mar 31, 1996	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 1996	Total Coliform Rule
Jul 1, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 22, 1994	Lead and Copper Rule
Apr 1, 1994	Apr 30, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 1994	Total Coliform Rule
Aug 1, 1991	Aug 31, 1991	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 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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