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HILLSBORO

Illinois — Community Water System — PWSID: IL1350300

System Information

PWSIDIL1350300
System NameHILLSBORO
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1981
Last ReportedDec 4, 2025

Location & Contact

StateIllinois
CityHILLSBORO
ZIP Code62049
AddressCITY OF HILLSBORO
OrganizationDOWNS, DON
Phone217-532-5566

Population & Service

Population Served4,402
Service Connections2,082

Drinking Water Violations (93)

This water system has 93 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 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jul 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Apr 1, 2025 Jun 30, 2025 Nitrate MR No Yes — 10 mg/L — Archived Jun 30, 2025 Nitrate Rule
Apr 1, 2025 Jun 30, 2025 Nitrate MR No Yes — 10 mg/L — Archived Jun 30, 2025 Nitrate Rule
Apr 1, 2025 Jun 30, 2025 Nitrite MR No Yes — 1 mg/L — Archived Jun 30, 2025 Nitrate Rule
Apr 1, 2025 Jun 30, 2025 Nitrite MR No Yes — 1 mg/L — Archived Jun 30, 2025 Nitrate Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Jun 30, 2023 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2023 Synthetic Organic Chemicals
Apr 1, 2023 Jun 30, 2023 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2023 Synthetic Organic Chemicals
Apr 1, 2023 Jun 30, 2023 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2023 Synthetic Organic Chemicals
Apr 1, 2023 Jun 30, 2023 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2023 Synthetic Organic Chemicals
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .063 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .067 MG/L 0.060 mg/L .06 Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .067 MG/L 0.060 mg/L .06 Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .067 MG/L 0.060 mg/L .06 Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .067 MG/L 0.060 mg/L .06 Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .067 MG/L 0.060 mg/L .06 Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 Total Haloacetic Acids (HAA5) MCL Yes No .067 MG/L 0.060 mg/L .06 Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Dec 31, 2019 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2017 Dec 31, 2019 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2017 Dec 31, 2019 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2017 Dec 31, 2019 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No 67 UG/L 0.060 mg/L 60 Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No 67 UG/L 0.060 mg/L 60 Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No 67 UG/L 0.060 mg/L 60 Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No 67 UG/L 0.060 mg/L 60 Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No 67 UG/L 0.060 mg/L 60 Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MCL Yes No 67 UG/L 0.060 mg/L 60 Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No 64 UG/L 0.060 mg/L 60 Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No 64 UG/L 0.060 mg/L 60 Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No 64 UG/L 0.060 mg/L 60 Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No 64 UG/L 0.060 mg/L 60 Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No 64 UG/L 0.060 mg/L 60 Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No 64 UG/L 0.060 mg/L 60 Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Jul 31, 2009 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2009 Jul 31, 2009 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2009 Interim and Long Term 1 Enhanced Surface Water Treatment 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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