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GASTON, CITY OF

Oregon — Community Water System — PWSID: OR4100312

System Information

PWSIDOR4100312
System NameGASTON, CITY OF
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 12, 1979
Last ReportedDec 23, 2025

Location & Contact

StateOregon
CityGASTON
ZIP Code97119
AddressPO BOX 129
OrganizationGASTON, CITY OF
Phone503-985-3340

Population & Service

Population Served625
Service Connections335

Drinking Water Violations (43)

This water system has 43 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, 2024 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Nov 25, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 30, 2024 Consumer Confidence Rule
Oct 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Oct 19, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 20, 2023 Consumer Confidence Rule
Oct 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Jul 23, 2018 Lead and Copper Rule
Jul 1, 2017 Sep 30, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Jul 31, 2016 Revised Total Coliform Rule MON No Yes — — — Archived Jul 31, 2016 Revised Total Coliform Rule
Jul 1, 2016 Sep 30, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Sep 30, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2016 Jun 30, 2016 Revised Total Coliform Rule MON No Yes — — — Archived Jun 30, 2016 Revised Total Coliform Rule
Apr 1, 2016 Jun 30, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2015 Nov 30, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2015 Total Coliform Rule
Oct 1, 2015 Dec 31, 2015 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2015 Jun 30, 2015 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2015 Jun 30, 2015 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Jul 23, 2018 Lead and Copper Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Jul 23, 2018 Lead and Copper Rule
Oct 1, 2014 Oct 31, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2014 Total Coliform Rule
Jul 1, 2014 Sep 30, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Mar 31, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Mar 31, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Jan 31, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2014 Total Coliform Rule
Jan 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Oct 24, 2011 Lead and Copper Rule
Jan 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Oct 24, 2011 Lead and Copper Rule
Jan 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Oct 24, 2011 Lead and Copper Rule
Jan 1, 2009 Jan 31, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Jan 31, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Jan 31, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Jan 31, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2001 Jul 31, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2001 Total Coliform Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Sep 13, 1994 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
Jul 1, 1993 Jul 31, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1993 Total Coliform Rule
Jun 1, 1993 Jun 30, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jun 30, 1993 Total Coliform Rule

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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