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CORVALLIS, CITY OF

Oregon — Community Water System — PWSID: OR4100225

System Information

PWSIDOR4100225
System NameCORVALLIS, 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
CityCORVALLIS
ZIP Code97339
AddressPO BOX 1083
OrganizationCORVALLIS, CITY OF
Phone541-754-1758

Population & Service

Population Served61,468
Service Connections17,489

Drinking Water Violations (36)

This water system has 36 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, 2020 Oct 31, 2020 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2020 Oct 31, 2020 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2020 Oct 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2020 Surface Water Treatment Rule
Oct 1, 2020 Oct 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2020 Surface Water Treatment Rule
Oct 1, 2020 Oct 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2020 Surface Water Treatment Rule
Oct 1, 2020 Oct 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2020 Surface Water Treatment Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 9, 2020 Lead and Copper Rule
Jul 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Dec 9, 2020 Lead and Copper Rule
Jun 1, 2020 Jun 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2020 Revised Total Coliform Rule
Dec 1, 2019 Dec 31, 2019 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2019 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2019 Dec 31, 2019 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2019 Surface Water Treatment Rule
Dec 1, 2019 Dec 31, 2019 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2019 Surface Water Treatment Rule
Dec 1, 2019 Dec 31, 2019 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2019 Surface Water Treatment Rule
Dec 1, 2019 Dec 31, 2019 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2019 Surface Water Treatment Rule
Dec 1, 2019 Dec 31, 2019 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2019 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2017 Aug 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2017 Surface Water Treatment Rule
Aug 1, 2017 Aug 31, 2017 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2017 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2017 Aug 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2017 Surface Water Treatment Rule
Aug 1, 2017 Aug 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2017 Surface Water Treatment Rule
Aug 1, 2017 Aug 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2017 Surface Water Treatment Rule
Aug 1, 2017 Aug 31, 2017 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2017 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2012 Mar 31, 2012 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2012 Surface Water Treatment Rule
Mar 1, 2012 Mar 31, 2012 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2012 Surface Water Treatment Rule
Mar 1, 2012 Mar 31, 2012 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2012 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2012 Mar 31, 2012 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2012 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2012 Mar 31, 2012 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2012 Surface Water Treatment Rule
Mar 1, 2012 Mar 31, 2012 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2012 Surface Water Treatment Rule
Dec 1, 2011 Dec 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2011 Total Coliform Rule
Dec 1, 2011 Dec 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2011 Total Coliform Rule
Jun 24, 1979 Jun 23, 1980 Fluoride MR No No — 4.0 mg/L — Archived Jun 23, 1980 Inorganic Chemicals
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
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
— — — No No — — — — — —
— — — 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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