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Product Safety9,700+ CPSC product recalls Food Safety28,600+ FDA food recalls Pet Safety1.3M FDA animal adverse events Drug Safety17,500+ FDA drug recalls Device Safety38,400+ FDA device recalls Workplace Safety102,900+ OSHA injury reports Brand HistoryRecall lookup by company

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ONTARIO WATERWORKS

Wisconsin — Community Water System — PWSID: WI6630259

System Information

PWSIDWI6630259
System NameONTARIO WATERWORKS
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedJan 28, 1981
Last ReportedMar 2, 2026

Location & Contact

StateWisconsin
CityOntario
ZIP Code54651
Address205 STATE STREET
OrganizationONTARIO VILLAGE CLERK/TERRI TAYLOR
Phone—

Population & Service

Population Served554
Service Connections241

Drinking Water Violations (82)

This water system has 82 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 MON No No — — — Resolved Jul 31, 2025 —
Jul 1, 2025 Jul 31, 2025 MON No No — — — Resolved Jul 31, 2025 —
Jul 1, 2025 Jul 31, 2025 MON No No — — — Resolved Jul 31, 2025 —
Jan 1, 2025 Dec 31, 2025 MR No No — 0.080 mg/L — Archived Dec 31, 2025 —
Jan 1, 2025 Dec 31, 2025 MR No No — 0.080 mg/L — Archived Dec 31, 2025 —
Jan 1, 2025 Dec 31, 2025 MR No No — 0.060 mg/L — Archived Dec 31, 2025 —
Jan 1, 2025 Dec 31, 2025 MR No No — 0.060 mg/L — Archived Dec 31, 2025 —
Oct 17, 2024 — TT Yes No — — — Resolved Jun 9, 2025 —
Oct 17, 2024 — TT Yes No — — — Resolved Jun 9, 2025 —
Oct 17, 2024 — Other No No — — — Unaddressed — —
Apr 1, 2009 Apr 30, 2009 MR No No — 5% of samples — Resolved Apr 30, 2009 —
Apr 1, 2009 Jun 30, 2009 MR No Yes — 4.0 mg/L — Resolved May 18, 2009 —
Apr 1, 2009 Apr 30, 2009 MR No No — 5% of samples — Resolved Apr 30, 2009 —
Apr 1, 2009 Apr 30, 2009 MR No No — 5% of samples — Resolved Apr 30, 2009 —
Apr 1, 2009 Apr 30, 2009 MR No No — 5% of samples — Resolved Apr 30, 2009 —
Apr 1, 2009 Jun 30, 2009 MR No Yes — 4.0 mg/L — Resolved May 18, 2009 —
Apr 1, 2009 Jun 30, 2009 MR No Yes — 4.0 mg/L — Resolved May 18, 2009 —
Apr 1, 2009 Jun 30, 2009 MR No Yes — 4.0 mg/L — Resolved May 18, 2009 —
Jun 1, 2006 Jun 30, 2006 MCL Yes No — 5% of samples — Resolved Jun 21, 2006 —
Jun 1, 2006 Jun 30, 2006 MCL Yes No — 5% of samples — Resolved Jun 21, 2006 —
Jun 1, 2006 Jun 30, 2006 MCL Yes No — 5% of samples — Resolved Jun 21, 2006 —
Jun 1, 2006 Jun 30, 2006 MCL Yes No — 5% of samples — Resolved Jun 21, 2006 —
Oct 1, 2001 Oct 31, 2001 MCL Yes No — 5% of samples — Resolved Oct 19, 2001 —
Oct 1, 2001 Oct 31, 2001 MCL Yes No — 5% of samples — Resolved Oct 19, 2001 —
Oct 1, 2001 Oct 31, 2001 MCL Yes No — 5% of samples — Resolved Oct 19, 2001 —
Oct 1, 2001 Oct 31, 2001 MCL Yes No — 5% of samples — Resolved Oct 19, 2001 —
Oct 1, 2001 Oct 31, 2001 MCL Yes No — 5% of samples — Resolved Oct 19, 2001 —
Oct 1, 2001 Oct 31, 2001 MCL Yes No — 5% of samples — Resolved Oct 19, 2001 —
Jun 1, 1998 Jun 30, 1998 MR No No — 5% of samples — Resolved Jun 30, 1998 —
Jun 1, 1998 Jun 30, 1998 MR No No — 5% of samples — Resolved Jun 30, 1998 —
Jun 1, 1998 Jun 30, 1998 MR No No — 5% of samples — Resolved Jun 30, 1998 —
Jun 1, 1998 Jun 30, 1998 MR No No — 5% of samples — Resolved Jun 30, 1998 —
May 1, 1998 May 31, 1998 MCL Yes No — 5% of samples — Resolved May 31, 1998 —
May 1, 1998 May 31, 1998 MCL Yes No — 5% of samples — Resolved May 31, 1998 —
May 1, 1998 May 31, 1998 MCL Yes No — 5% of samples — Resolved May 31, 1998 —
May 1, 1998 May 31, 1998 MCL Yes No — 5% of samples — Resolved May 31, 1998 —
May 1, 1998 May 31, 1998 MCL Yes No — 5% of samples — Resolved May 31, 1998 —
Oct 1, 1997 Oct 31, 1997 MCL Yes No — 5% of samples — Resolved Oct 27, 1997 —
Oct 1, 1997 Oct 31, 1997 MCL Yes No — 5% of samples — Resolved Oct 27, 1997 —
Oct 1, 1997 Oct 31, 1997 MCL Yes No — 5% of samples — Resolved Oct 27, 1997 —
May 1, 1996 May 31, 1996 MCL Yes No — 5% of samples — Resolved May 31, 1996 —
May 1, 1996 May 31, 1996 MCL Yes No — 5% of samples — Resolved May 31, 1996 —
May 1, 1996 May 31, 1996 MCL Yes No — 5% of samples — Resolved May 31, 1996 —
May 1, 1996 May 31, 1996 MCL Yes No — 5% of samples — Resolved May 31, 1996 —
May 1, 1995 May 31, 1995 MCL Yes No — 5% of samples — Resolved May 26, 1995 —
May 1, 1995 May 31, 1995 MCL Yes No — 5% of samples — Resolved May 26, 1995 —
May 1, 1995 May 31, 1995 MCL Yes No — 5% of samples — Resolved May 26, 1995 —
May 1, 1995 May 31, 1995 MCL Yes No — 5% of samples — Resolved May 26, 1995 —
May 1, 1995 May 31, 1995 MCL Yes No — 5% of samples — Resolved May 26, 1995 —
Aug 1, 1994 Aug 31, 1994 MCL Yes No — 5% of samples — Resolved Aug 31, 1994 —

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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