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LA SALLE

Illinois — Community Water System — PWSID: IL0990300

System Information

PWSIDIL0990300
System NameLA SALLE
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1981
Last ReportedDec 4, 2025

Location & Contact

StateIllinois
CityLA SALLE
ZIP Code61301
AddressCITY OF LA SALLE
OrganizationGROVE, JEFFREY
Phone815-223-3755

Population & Service

Population Served9,700
Service Connections3,967

Drinking Water Violations (209)

This water system has 209 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
Jun 1, 2024 Jun 30, 2024 Revised Total Coliform Rule MON No No — — — Resolved Jun 30, 2024 Revised Total Coliform Rule
Jun 1, 2024 Jun 30, 2024 Revised Total Coliform Rule MON No No — — — Resolved Jun 30, 2024 Revised Total Coliform Rule
Jun 1, 2024 Jun 30, 2024 Revised Total Coliform Rule MON No No — — — Resolved Jun 30, 2024 Revised Total Coliform Rule
Jun 1, 2024 Jun 30, 2024 Revised Total Coliform Rule MON No No — — — Resolved Jun 30, 2024 Revised Total Coliform Rule
Apr 1, 2024 Jun 30, 2024 Chlorine MR No No — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Jun 30, 2024 Chlorine MR No No — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Jun 30, 2024 Chlorine MR No No — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Jun 30, 2024 Chlorine MR No No — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 TTHM MCL Yes No .087 MG/L 0.080 mg/L .08 Resolved Sep 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Jun 30, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 TTHM MCL Yes No .086 MG/L 0.080 mg/L .08 Resolved Mar 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .088 MG/L 0.080 mg/L .08 Resolved Jun 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts 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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