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LYONS MEHAMA WATER DISTRICT

Oregon — Community Water System — PWSID: OR4100493

System Information

PWSIDOR4100493
System NameLYONS MEHAMA WATER DISTRICT
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
CityLYONS
ZIP Code97358
AddressPO BOX 134
OrganizationLYONS MEHAMA WATER DISTRICT
Phone503-859-2367

Population & Service

Population Served1,300
Service Connections824

Drinking Water Violations (277)

This water system has 277 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
Aug 1, 2025 Aug 31, 2025 Surface Water Treatment Rule MR No Yes — — — Archived Aug 31, 2025 Surface Water Treatment Rule
Aug 1, 2025 Aug 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived Aug 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2025 Aug 31, 2025 Surface Water Treatment Rule MR No Yes — — — Archived Aug 31, 2025 Surface Water Treatment Rule
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Resolved Sep 19, 2025 Consumer Confidence Rule
Jul 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Apr 1, 2025 Apr 30, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2025 Surface Water Treatment Rule
Apr 1, 2025 Apr 30, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2025 Surface Water Treatment Rule
Apr 1, 2025 Apr 30, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Apr 30, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2025 Feb 28, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2025 Surface Water Treatment Rule
Feb 1, 2025 Feb 28, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2025 Feb 28, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Feb 28, 2025 Revised Total Coliform Rule
Feb 1, 2025 Feb 28, 2025 Surface Water Treatment Rule MR No Yes — — — Resolved Feb 28, 2025 Surface Water Treatment Rule
Jan 1, 2025 — Lead and Copper Rule MR No No — TT — Resolved Mar 31, 2025 Lead and Copper Rule
Jan 1, 2025 — Lead and Copper Rule MR No No — TT — Resolved Jun 3, 2025 Lead and Copper Rule
Dec 1, 2024 Dec 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Surface Water Treatment Rule
Nov 1, 2024 Nov 30, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2024 Surface Water Treatment Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Sep 29, 2025 Lead and Copper Rule
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Oct 22, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Oct 22, 2024 Consumer Confidence Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Feb 10, 2025 Lead and Copper Rule
Jan 1, 2024 Jan 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2024 Surface Water Treatment Rule
Jan 1, 2024 Jan 31, 2024 Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2024 Surface Water Treatment Rule
Jan 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Mar 8, 2024 Lead and Copper Rule
Jan 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Mar 8, 2024 Lead and Copper Rule
Jan 1, 2024 Jan 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jan 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2023 Dec 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2023 Dec 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2023 Surface Water Treatment Rule
Dec 1, 2023 Dec 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2023 Surface Water Treatment Rule
Oct 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Apr 10, 2024 Consumer Confidence Rule
Sep 1, 2023 Sep 30, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2023 Surface Water Treatment Rule
Sep 1, 2023 Sep 30, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2023 Surface Water Treatment Rule
Sep 1, 2023 Sep 30, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2023 Aug 31, 2023 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2023 Aug 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2023 Surface Water Treatment Rule
Aug 1, 2023 Aug 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2023 Surface Water Treatment Rule
Jul 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Mar 8, 2024 Lead and Copper Rule
Jul 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Mar 8, 2024 Lead and Copper Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Apr 10, 2024 Consumer Confidence Rule
Jul 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Mar 8, 2024 Lead and Copper Rule
Jul 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Mar 8, 2024 Lead and Copper 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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