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WARRENTON, CITY OF

Oregon — Community Water System — PWSID: OR4100932

System Information

PWSIDOR4100932
System NameWARRENTON, CITY OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 12, 1979
Last ReportedDec 23, 2025

Location & Contact

StateOregon
CityWARRENTON
ZIP Code97146
AddressPO BOX 250
OrganizationWARRENTON, CITY OF
Phone503-738-7809

Population & Service

Population Served9,100
Service Connections3,737

Drinking Water Violations (136)

This water system has 136 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 Jul 17, 2025 Consumer Confidence Rule
Oct 1, 2013 Dec 31, 2013 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2013 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 Dec 31, 2013 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2013 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2009 Jun 30, 2009 Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2009 Surface Water Treatment Rule
Jun 1, 2009 Jun 30, 2009 Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2009 Surface Water Treatment Rule
Jun 1, 2009 Jun 30, 2009 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2009 Jun 30, 2009 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2008 Dec 31, 2008 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2008 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Jul 1, 2007 Sep 30, 2007 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2007 Sep 30, 2007 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Mar 1, 2007 Mar 31, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 2007 Total Coliform Rule
Feb 1, 2007 Feb 28, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2007 Total Coliform Rule
Dec 1, 2006 Dec 31, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2006 Total Coliform Rule
Nov 1, 2006 Nov 30, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2006 Total Coliform Rule
Oct 1, 2006 Oct 31, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2006 Total Coliform Rule
Aug 1, 2006 Aug 31, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2006 Total Coliform Rule
Jan 1, 2006 Dec 31, 2006 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2006 Arsenic 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 Nov 24, 2004 Consumer Confidence Rule
Oct 1, 2004 Dec 31, 2004 Total Haloacetic Acids (HAA5) MCL Yes No .080425 MG/L 0.060 mg/L .06 Resolved Dec 31, 2004 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2004 Dec 31, 2004 Total Haloacetic Acids (HAA5) MCL Yes No .080425 MG/L 0.060 mg/L .06 Resolved Dec 31, 2004 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2004 — Consumer Confidence Rule Other No No — — — Resolved Nov 18, 2004 Consumer Confidence Rule
Apr 1, 2004 Apr 30, 2004 Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2004 Surface Water Treatment Rule
Jan 1, 2004 Dec 31, 2004 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2004 Nitrate Rule
Jan 1, 2004 Dec 31, 2004 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals

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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