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MONTREAL WATERWORKS

Wisconsin — Community Water System — PWSID: WI8260121

System Information

PWSIDWI8260121
System NameMONTREAL WATERWORKS
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerYes
First ReportedJan 28, 1981
Last ReportedDec 17, 2025

Location & Contact

StateWisconsin
CityMONTREAL
ZIP Code54550-9701
AddressCITY OF MONTREAL
OrganizationMONTREAL CITY ATTN CLERK
Phone—

Population & Service

Population Served887
Service Connections190

Drinking Water Violations (545)

This water system has 545 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 2, 2025 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Unaddressed — Lead and Copper Rule Revisions
Jun 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Sep 25, 2024 Lead and Copper Rule
Jun 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Sep 25, 2024 Lead and Copper Rule
Jun 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Sep 25, 2024 Lead and Copper Rule
Jun 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Sep 25, 2024 Lead and Copper Rule
May 2, 2023 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved May 4, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 2, 2023 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved May 4, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Nov 2, 2018 Ground Water Rule
May 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Nov 2, 2018 Ground Water Rule
May 2, 2018 — Public Notice Other No No — — — Resolved Jul 20, 2018 Public Notice Rule and Revised PN Rule
May 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Nov 2, 2018 Ground Water Rule
May 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Nov 2, 2018 Ground Water Rule
May 2, 2018 — Public Notice Other No No — — — Resolved Jul 20, 2018 Public Notice Rule and Revised PN Rule
May 2, 2018 — Groundwater Rule TT Yes No — — — Resolved Nov 2, 2018 Ground Water Rule
Apr 16, 2016 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved May 13, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 16, 2016 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved May 13, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Feb 8, 2016 — Public Notice Other No No — — — Resolved Apr 14, 2017 Public Notice Rule and Revised PN Rule
Feb 8, 2016 — Public Notice Other No No — — — Resolved Apr 14, 2017 Public Notice Rule and Revised PN Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No No — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2015 Dec 31, 2015 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 26, 2013 — E. COLI MR No Yes — — — Resolved Oct 1, 2013 Ground Water Rule
Sep 26, 2013 — E. COLI MR No Yes — — — Resolved Oct 1, 2013 Ground Water Rule
Sep 26, 2013 — E. COLI MR No Yes — — — Resolved Oct 1, 2013 Ground Water Rule
Sep 26, 2013 — E. COLI MR No Yes — — — Resolved Oct 1, 2013 Ground Water Rule
Sep 26, 2013 — E. COLI MR No Yes — — — Resolved Oct 1, 2013 Ground Water Rule
Oct 1, 2011 Dec 31, 2011 Total Haloacetic Acids (HAA5) MCL Yes No 63.43 UG/L 0.060 mg/L 60.5 Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 Dec 31, 2011 Total Haloacetic Acids (HAA5) MCL Yes No 63.43 UG/L 0.060 mg/L 60.5 Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 Dec 31, 2011 Total Haloacetic Acids (HAA5) MCL Yes No 63.43 UG/L 0.060 mg/L 60.5 Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Oct 1, 2011 Dec 31, 2011 Total Haloacetic Acids (HAA5) MCL Yes No 63.43 UG/L 0.060 mg/L 60.5 Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 Dec 31, 2011 Total Haloacetic Acids (HAA5) MCL Yes No 63.43 UG/L 0.060 mg/L 60.5 Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Aug 4, 2011 — E. COLI MR No Yes — — — Resolved Aug 16, 2011 Ground Water 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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