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YONCALLA, CITY OF

Oregon — Community Water System — PWSID: OR4100958

System Information

PWSIDOR4100958
System NameYONCALLA, 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
CityYONCALLA
ZIP Code97499
Address2640 EAGLE VALLEY RD
OrganizationYONCALLA, CITY OF
Phone541-419-7958

Population & Service

Population Served1,050
Service Connections598

Drinking Water Violations (403)

This water system has 403 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 Jul 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Unaddressed — Consumer Confidence Rule
Jul 1, 2025 Jul 31, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2025 Surface Water Treatment Rule
Jul 1, 2025 Jul 31, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2025 Surface Water Treatment Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jun 14, 2024 Consumer Confidence Rule
Feb 1, 2024 Feb 29, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 29, 2024 Surface Water Treatment Rule
Feb 1, 2024 Feb 29, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Feb 29, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2024 Feb 29, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 29, 2024 Surface Water Treatment Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 20, 2023 Consumer Confidence Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Nov 1, 2021 Nov 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2021 Surface Water Treatment Rule
Nov 1, 2021 Nov 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2021 Surface Water Treatment Rule
Nov 1, 2021 Nov 30, 2021 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2021 Nov 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2021 Surface Water Treatment Rule
Nov 1, 2021 Nov 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2021 Surface Water Treatment Rule
Nov 1, 2021 Nov 30, 2021 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2020 Jul 31, 2020 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2020 Jul 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2020 Surface Water Treatment Rule
Jul 1, 2020 Jul 31, 2020 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2020 Surface Water Treatment Rule
Oct 1, 2018 Oct 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2018 Surface Water Treatment Rule
Oct 1, 2018 Oct 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2018 Surface Water Treatment Rule
Oct 1, 2018 Oct 31, 2018 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2018 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2018 May 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2018 Surface Water Treatment Rule
May 1, 2018 May 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2018 Surface Water Treatment Rule
May 1, 2018 May 31, 2018 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2018 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2018 Mar 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2018 Revised Total Coliform Rule
Feb 1, 2018 Feb 28, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2018 Surface Water Treatment Rule
Feb 1, 2018 Feb 28, 2018 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2018 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2018 Feb 28, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2018 Surface Water Treatment Rule
Jan 1, 2018 Jan 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2018 Surface Water Treatment Rule
Jan 1, 2018 Jan 31, 2018 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2018 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2018 Jan 31, 2018 Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2018 Surface Water Treatment Rule
Oct 1, 2017 Oct 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2017 Surface Water Treatment Rule
Oct 1, 2017 Oct 31, 2017 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2017 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2017 Oct 31, 2017 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2017 Surface Water Treatment Rule
Dec 1, 2016 Dec 31, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2016 Surface Water Treatment Rule
Dec 1, 2016 Dec 31, 2016 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2016 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2016 Dec 31, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2016 Surface Water Treatment Rule
Aug 1, 2016 Aug 31, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2016 Surface Water Treatment Rule
Aug 1, 2016 Aug 31, 2016 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2016 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2016 Aug 31, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2016 Surface Water Treatment Rule
Jun 1, 2016 Jun 30, 2016 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2016 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2016 Jun 30, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2016 Surface Water Treatment Rule
Jun 1, 2016 Jun 30, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2016 Surface Water Treatment 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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