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THERESA WATERWORKS

Wisconsin — Community Water System — PWSID: WI1140154

System Information

PWSIDWI1140154
System NameTHERESA WATERWORKS
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedJan 28, 1981
Last ReportedDec 17, 2025

Location & Contact

StateWisconsin
CityTHERESA
ZIP Code53091-0327
Address292 MAYVILLE ST
OrganizationTHERESA VILLAGE CLERK AND TREASURER - BECKY TELLIER
Phone—

Population & Service

Population Served1,262
Service Connections569

Drinking Water Violations (188)

This water system has 188 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
Sep 3, 2025 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Sep 25, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 3, 2025 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Sep 25, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 17, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Sep 24, 2019 Consumer Confidence Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Jul 27, 2019 Consumer Confidence Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Sep 24, 2019 Consumer Confidence Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Jul 27, 2019 Consumer Confidence Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Sep 24, 2019 Consumer Confidence Rule
Oct 1, 2018 — Public Notice Other No No — — — Resolved Dec 2, 2019 Public Notice Rule and Revised PN Rule
Oct 1, 2018 — Public Notice Other No No — — — Resolved Dec 2, 2019 Public Notice Rule and Revised PN Rule
Jul 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 10, 2018 Consumer Confidence Rule
Jul 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 10, 2018 Consumer Confidence Rule
Jul 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 10, 2018 Consumer Confidence Rule
Jul 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 10, 2018 Consumer Confidence Rule
Jul 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 10, 2018 Consumer Confidence Rule
Jan 1, 2018 Dec 31, 2018 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 — Lead and Copper Rule MR No No — TT — Resolved Jan 25, 2018 Lead and Copper Rule
Jan 1, 2018 Dec 31, 2018 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Dec 31, 2018 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Dec 31, 2018 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Dec 31, 2018 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Dec 31, 2018 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2017 Sep 30, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2017 Revised Total Coliform Rule
Sep 1, 2017 Sep 30, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2017 Revised Total Coliform Rule
Sep 1, 2017 Sep 30, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2017 Revised Total Coliform Rule
Sep 1, 2017 Sep 30, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2017 Revised Total Coliform Rule
Jul 1, 2014 Jul 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2014 Total Coliform Rule
Jul 1, 2014 Jul 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2014 Total Coliform Rule
Jul 1, 2014 Jul 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2014 Total Coliform Rule
Jul 1, 2014 Jul 31, 2014 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2014 Total Coliform Rule
Jan 1, 2013 Mar 31, 2013 Chlorine MR No No — 4.0 mg/L — Resolved Feb 19, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2013 Jan 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2013 Total Coliform Rule
Jan 1, 2013 Mar 31, 2013 Chlorine MR No No — 4.0 mg/L — Resolved Feb 19, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2013 Mar 31, 2013 Chlorine MR No No — 4.0 mg/L — Resolved Feb 19, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2013 Jan 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2013 Total Coliform Rule
Jan 1, 2013 Mar 31, 2013 Chlorine MR No No — 4.0 mg/L — Resolved Feb 19, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2013 Jan 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2013 Total Coliform Rule
Jan 1, 2013 Jan 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2013 Total Coliform Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Oct 1, 2008 Dec 31, 2008 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2008 Volatile Organic Chemicals
Oct 1, 2008 Dec 31, 2008 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Volatile 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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