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LAONA SANITARY DIST

Wisconsin — Community Water System — PWSID: WI7210108

System Information

PWSIDWI7210108
System NameLAONA SANITARY DIST
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
CityLAONA
ZIP Code54541
AddressPO BOX 303
OrganizationLAONA SANITARY DISTRICT
Phone—

Population & Service

Population Served950
Service Connections442

Drinking Water Violations (165)

This water system has 165 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
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Unaddressed — Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Unaddressed — Lead and Copper Rule Revisions
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 12, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 12, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 12, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 12, 2023 Consumer Confidence Rule
Sep 1, 2022 Sep 30, 2022 Revised Total Coliform Rule MON No No — — — Resolved Sep 30, 2022 Revised Total Coliform Rule
Sep 1, 2022 Sep 30, 2022 Revised Total Coliform Rule MON No No — — — Resolved Sep 30, 2022 Revised Total Coliform Rule
Sep 1, 2022 Sep 30, 2022 Revised Total Coliform Rule MON No No — — — Resolved Sep 30, 2022 Revised Total Coliform Rule
Sep 1, 2022 Sep 30, 2022 Revised Total Coliform Rule MON No No — — — Resolved Sep 30, 2022 Revised Total Coliform Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No No — 0.080 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No No — 0.080 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No No — 0.080 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No No — 0.080 mg/L — Resolved Oct 18, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2010 Nov 30, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Nov 30, 2010 Total Coliform Rule
Nov 1, 2010 Nov 30, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Nov 30, 2010 Total Coliform Rule
Nov 1, 2010 Nov 30, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Nov 30, 2010 Total Coliform Rule
Nov 1, 2010 Nov 30, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Nov 30, 2010 Total Coliform Rule
Nov 1, 2010 Nov 30, 2010 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Nov 30, 2010 Total Coliform Rule
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Oct 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 22, 2011 Consumer Confidence Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Aug 3, 2009 Consumer Confidence Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Aug 3, 2009 Consumer Confidence Rule
Dec 1, 2008 — Public Notice Other No No — — — Resolved Feb 22, 2011 Public Notice Rule and Revised PN Rule
Nov 1, 2008 Nov 30, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2008 Total Coliform Rule
Nov 1, 2008 Nov 30, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2008 Total Coliform Rule
Nov 1, 2008 Nov 30, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2008 Total Coliform Rule
Nov 1, 2008 Nov 30, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2008 Total Coliform Rule
Oct 1, 2008 Dec 31, 2008 Chlorine MR No No — 4.0 mg/L — Resolved Dec 1, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 Chlorine MR No No — 4.0 mg/L — Resolved Dec 1, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2001 Oct 31, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2001 Total Coliform Rule
Oct 1, 2001 Oct 31, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2001 Total Coliform Rule
Oct 1, 2001 Oct 31, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2001 Total Coliform Rule
Oct 1, 2001 Oct 31, 2001 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2001 Total Coliform Rule
Dec 1, 2000 Dec 31, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2000 Total Coliform Rule
Dec 1, 2000 Dec 31, 2000 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2000 Total Coliform Rule
Jul 1, 1997 Sep 30, 1997 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Sep 30, 1997 Volatile Organic Chemicals
Jul 1, 1997 Sep 30, 1997 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Sep 30, 1997 Volatile Organic Chemicals
Jul 1, 1997 Sep 30, 1997 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Sep 30, 1997 Volatile Organic Chemicals
Jul 1, 1997 Sep 30, 1997 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Sep 30, 1997 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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