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RIDDLE, CITY OF

Oregon — Community Water System — PWSID: OR4100706

System Information

PWSIDOR4100706
System NameRIDDLE, 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
CityRIDDLE
ZIP Code97469
AddressPO BOX 143
OrganizationRIDDLE, CITY OF
Phone541-874-2905

Population & Service

Population Served1,224
Service Connections589

Drinking Water Violations (94)

This water system has 94 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
Sep 1, 2025 Sep 30, 2025 Surface Water Treatment Rule MR No Yes — — — Archived Sep 30, 2025 Surface Water Treatment Rule
Sep 1, 2025 Sep 30, 2025 Surface Water Treatment Rule MR No Yes — — — Archived Sep 30, 2025 Surface Water Treatment Rule
Sep 1, 2025 Sep 30, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived Sep 30, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2024 May 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2024 May 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2024 Surface Water Treatment Rule
May 1, 2024 May 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2024 Surface Water Treatment Rule
Apr 1, 2024 Jun 30, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Jun 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2023 Nov 30, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2023 Nov 30, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2023 Surface Water Treatment Rule
Nov 1, 2023 Nov 30, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2023 Surface Water Treatment Rule
Oct 1, 2023 Oct 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2023 Surface Water Treatment Rule
Oct 1, 2023 Oct 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2023 Oct 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2023 Surface Water Treatment Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 21, 2023 Consumer Confidence Rule
Mar 1, 2023 Mar 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2023 Surface Water Treatment Rule
Mar 1, 2023 Mar 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2023 Surface Water Treatment Rule
Mar 1, 2023 Mar 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2021 Jul 31, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2021 Surface Water Treatment Rule
Jul 1, 2021 Jul 31, 2021 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2021 Jul 31, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2021 Surface Water Treatment Rule
Sep 1, 2020 Sep 30, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2020 Surface Water Treatment Rule
Sep 1, 2020 Sep 30, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2020 Surface Water Treatment Rule
Sep 1, 2020 Sep 30, 2020 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2020 Mar 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2020 Surface Water Treatment Rule
Mar 1, 2020 Mar 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2020 Surface Water Treatment Rule
Mar 1, 2020 Mar 31, 2020 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2019 Feb 28, 2019 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2019 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2019 Feb 28, 2019 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2019 Surface Water Treatment Rule
Feb 1, 2019 Feb 28, 2019 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2019 Surface Water Treatment Rule
Dec 1, 2018 Dec 31, 2018 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2018 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2018 Dec 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2018 Surface Water Treatment Rule
Dec 1, 2018 Dec 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2018 Surface Water Treatment Rule
Mar 1, 2018 Mar 31, 2018 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2018 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2018 Mar 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2018 Surface Water Treatment Rule
Mar 1, 2018 Mar 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2018 Surface Water Treatment Rule
Apr 1, 2017 Jun 30, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Jan 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2017 Surface Water Treatment Rule
Jan 1, 2017 Jan 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2017 Surface Water Treatment Rule
Jan 1, 2017 Jan 31, 2017 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2017 Interim and Long Term 1 Enhanced Surface Water Treatment 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
Aug 1, 2011 Aug 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2011 Total Coliform Rule
Aug 1, 2011 Aug 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2011 Total Coliform Rule
Dec 1, 2010 Dec 31, 2010 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2010 Surface Water Treatment Rule
Dec 1, 2010 Dec 31, 2010 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2010 Surface Water Treatment Rule
Dec 1, 2010 Dec 31, 2010 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2010 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2010 Dec 31, 2010 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2010 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2009 Oct 31, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Oct 31, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts 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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