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WILLOWBROOK

Illinois — Community Water System — PWSID: IL0431100

System Information

PWSIDIL0431100
System NameWILLOWBROOK
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1981
Last ReportedDec 4, 2025

Location & Contact

StateIllinois
CityWILLOWBROOK
ZIP Code60527
Address835 Midway Dr
OrganizationHALLORAN, SEAN
Phone630-323-8215

Population & Service

Population Served9,000
Service Connections2,207

Drinking Water Violations (33)

This water system has 33 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
Jul 2, 2025 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Unaddressed — Lead and Copper Rule Revisions
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Unaddressed — Consumer Confidence Rule
Oct 1, 2024 Dec 31, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Feb 5, 2024 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Feb 5, 2024 Consumer Confidence Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Feb 5, 2024 Consumer Confidence Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Feb 5, 2024 Consumer Confidence Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Aug 2, 2021 Consumer Confidence Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Aug 2, 2021 Consumer Confidence Rule
Dec 30, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 14, 2021 Lead and Copper Rule
Dec 30, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 14, 2021 Lead and Copper Rule
Jul 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Jul 29, 2013 Consumer Confidence Rule
Jul 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Jul 29, 2013 Consumer Confidence Rule
Jul 1, 1993 Jul 31, 1993 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1993 Total Coliform Rule
Jul 1, 1993 Jul 31, 1993 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1993 Total Coliform Rule
Jul 1, 1993 Jul 31, 1993 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1993 Total Coliform Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Dec 6, 1985 Dec 5, 1989 Combined Radium (-226 and -228) MCL Yes No 6.1 5 pCi/L — Archived Dec 5, 1989 Radionuclides and Revised Rad Rule
Jun 30, 1977 Jun 29, 1981 Gross Alpha, Excl. Radon and U MR No No — 15 pCi/L — Archived Jun 29, 1981 Radionuclides and Revised Rad Rule
— — — No No — — — — — —

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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