States ›Illinois ›Will County ›Crest Hill

Crest Hill, IL Tap Water Quality 2026

Water quality report for Crest Hill, IL — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Crest Hill's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Crest Hill PWSID: IL1970250 Updated: 2026 Q2
⚠️

PFAS above the federal limit at 3 of 7 sampling points

Lead is 1.23 ppb, 8% of the action level and no violations are open. However, PFAS exceeds the federal limit at 3 of 7 sampling points, running as high as 3.1 times the limit.

F

Crest Hill earns an F for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 1.23 ppb — 8% of the federal action level
PFAS above the federal limit at 3 of 7 sampling points
48 violations since 2015, 1 health-based
No violations currently open
Crest Hill's lead level vs. all Illinois community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.23 ppb — 8% of the federal action level
✓ Lower lead than 81% of Illinois utilities
Population Served
16749
~6500 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
48 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
8% of EPA action level
1.23 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
129.7% of EPA action level
1,686 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 1.23 ppb, 8% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Resolved
Public Notice OTHER — — 2025 Unaddressed
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Unaddressed
Consumer Confidence Rule OTHER — — 2025 Unaddressed
Public Notice OTHER — — 2025 Resolved
Public Notice OTHER — — 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
Consumer Confidence Rule OTHER — — 2024 Unaddressed
Lead and Copper Rule TREATMENT TECHNIQUE — TT 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2023 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2023 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2023–2025 Archived
Selenium MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2023–2025 Archived
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2023–2025 Archived
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Barium MONITORING AND REPORTING — 2 mg/L 2023–2025 Archived
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2023–2025 Archived
Nickel MONITORING AND REPORTING — — 2023–2025 Archived
Chromium MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Diquat MONITORING AND REPORTING — 0.02 mg/L 2023–2025 Archived
Diquat MONITORING AND REPORTING — 0.02 mg/L 2023–2025 Archived
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2020–2022 Archived
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2020–2022 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2018 Resolved
Consumer Confidence Rule OTHER — — 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2016–2017 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2016–2017 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2016 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2016 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

48 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Crest Hill
PWSID IL1970250
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 16,749
Service connections 6,500
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Crest Hill tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 3 of 7 sampling points. No violations are currently open. Lead is 1.23 ppb, 8% of the action level.
Does Crest Hill water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 3 of 7 sampling points, running as high as 3.1 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Crest Hill? ▼
Crest Hill (PWSID IL1970250), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2023-06-23. Inspectors recorded 3 significant deficiencies.

What Should Crest Hill Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Illinois

Joliet, Il Tap Water Quality 2026 Will Bolingbrook, Il Tap Water Quality 2026 Will Plainfield, Il Tap Water Quality 2026 Will Romeoville, Il Tap Water Quality 2026 Will New Lenox, Il Tap Water Quality 2026 Will Lockport, Il Tap Water Quality 2026 Will