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MOUNT VERNON, CITY OF

Oregon — Community Water System — PWSID: OR4100546

System Information

PWSIDOR4100546
System NameMOUNT VERNON, CITY OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 12, 1979
Last ReportedDec 23, 2025

Location & Contact

StateOregon
CityMOUNT VERNON
ZIP Code97865
AddressPO BOX 647
OrganizationMOUNT VERNON, CITY OF
Phone541-932-4688

Population & Service

Population Served510
Service Connections273

Drinking Water Violations (98)

This water system has 98 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 — Consumer Confidence Rule Other No No — — — Resolved Jul 21, 2025 Consumer Confidence Rule
Dec 24, 2015 — Public Notice Other No No — — — Resolved Dec 14, 2015 Public Notice Rule and Revised PN Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Nov 1, 2007 Nov 30, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2007 Total Coliform Rule
Oct 1, 2007 Oct 31, 2007 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2007 Total Coliform Rule
Aug 1, 2006 Aug 31, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 2006 Total Coliform Rule
Jan 1, 2005 Dec 31, 2007 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Jan 1, 2005 Dec 31, 2007 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Jan 1, 2005 Dec 31, 2007 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Jul 1, 2003 Jul 31, 2003 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2003 Total Coliform Rule
Jan 2, 2002 — Lead and Copper Rule TT Yes No — TT — Resolved Dec 25, 2010 Lead and Copper Rule
Jan 2, 2002 — Lead and Copper Rule TT Yes No — TT — Resolved Dec 25, 2010 Lead and Copper Rule
Jan 2, 2002 — Lead and Copper Rule TT Yes No — TT — Resolved Dec 25, 2010 Lead and Copper Rule
Jan 1, 2002 Dec 31, 2002 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2002 Nitrate Rule
Jan 1, 2002 Dec 31, 2004 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Mercury MR No Yes — 0.002 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2004 Arsenic Rule
Jan 1, 2002 Dec 31, 2004 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Nickel MR No Yes — — — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Selenium MR No Yes — 0.05 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 LASSO MR No Yes — — — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Beryllium, Total MR No Yes — 0.004 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2002 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2002 Nitrate Rule
Jan 1, 2002 Dec 31, 2004 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Thallium, Total MR No Yes — 0.002 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Cadmium MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 2,4-D MR No Yes — 0.07 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Carbofuran MR No Yes — 0.04 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals

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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