PlainWater
States → Illinois

Community Water System · PWS IL1970250

Crest Hill

Crest Hill, Illinois 60403 - drinking water served from groundwater sources to 21,169 people, tracked in EPA SDWIS and UCMR5.

21,169
People served
190
EPA violations
29
Health-based
7 PFAS
UCMR5 result

The verdict

EPA records 190 drinking-water violations at Crest Hill, 15% of them health-based - above the Illinois per-system average, and UCMR5 testing detected 7 PFAS compounds.

190
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
21,169
People served by this system
7
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Crest Hill

Crest Hill is a local-owned community water system that delivers drinking water to 21,169 residents in Crest Hill, Illinois (Will County) through 6,500 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 190 total violations for this system , of which 29 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 126 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 27 violations (MON). Under EPA's UCMR5 PFAS monitoring program, 7 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 52.1 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Crest Hill's 190 violations sit above the Illinois average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
21,169
Total Violations
190
Health-Based Violations
29
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
6,500
County
Will
School/Daycare
No
MCL Violations
17
Monitoring Violations
126
Treatment Tech Violations
12

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 27 2021
Chlorine MR 24 2021
Coliform (TCR) MCL 17 2001
Lead and Copper Rule MR 14 2024
Lead and Copper Rule TT 12 2024
TTHM MR 8 2023
Total Haloacetic Acids (HAA5) MR 8 2023
Carbon tetrachloride MR 6 1992
Trichloroethylene MR 6 1992
Consumer Confidence Rule Other 6 2025
Coliform (TCR) MR 5 1997
Public Notice Other 5 2025
p-Dichlorobenzene MR 4 1990
1,1-Dichloroethylene MR 4 1990
1,2-Dichloroethane MR 4 1990
1,1,1-Trichloroethane MR 4 1990
Benzene MR 4 1990
Combined Radium (-226 and -228) MR 4 2020
CYANIDE MR 3 2020
LEAD AND COPPER RULE REVISIONS RPT 2 2025
Gross Alpha, Excl. Radon and U MR 1 1977

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 68 of 406 samples detected PFAS.

Contaminant Date Result MRL Status
PFMPA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
ADONA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/12/2023 12.50 ppt 5.00 ppt Detected
6:2 FTS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 6/12/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeA 6/12/2023 17.30 ppt 3.00 ppt Detected
PFMBA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/12/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 6/12/2023 <8.00 ppt 8.00 ppt Not Detected
PFBS 6/12/2023 27.80 ppt 3.00 ppt Detected
PFHpA 6/12/2023 10.00 ppt 3.00 ppt Detected
PFHxS 6/12/2023 5.10 ppt 3.00 ppt Detected
NMeFOSAA 6/12/2023 <6.00 ppt 6.00 ppt Not Detected
9Cl-PF3ONS 6/12/2023 <2.00 ppt 2.00 ppt Not Detected
PFTrDA 6/12/2023 <7.00 ppt 7.00 ppt Not Detected
PFNA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/12/2023 11.10 ppt 4.00 ppt Detected
PFDA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/12/2023 15.10 ppt 3.00 ppt Detected
NEtFOSAA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/12/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeS 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 6/12/2023 <20.00 ppt 20.00 ppt Not Detected
PFDA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/12/2023 3.50 ppt 3.00 ppt Detected
PFPeA 6/12/2023 4.90 ppt 3.00 ppt Detected
PFMPA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFOA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
ADONA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/12/2023 <2.00 ppt 2.00 ppt Not Detected
HFPO-DA 6/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFNA 6/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/12/2023 9.90 ppt 3.00 ppt Detected
PFHpA 6/12/2023 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Crest Hill.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID IL1970250 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Crest Hill under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Consumer Confidence Rule Other 6 SDWIS / IL1970250 / 7000
2025 Public Notice Other 5 SDWIS / IL1970250 / 7500
2025 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / IL1970250 / 5200
2024 Lead and Copper Rule MR 14 SDWIS / IL1970250 / 5000
2024 Lead and Copper Rule TT 12 SDWIS / IL1970250 / 5000
2023 TTHM MR 8 SDWIS / IL1970250 / 2950
2023 Total Haloacetic Acids (HAA5) MR 8 SDWIS / IL1970250 / 2456
2021 Revised Total Coliform Rule MON 27 SDWIS / IL1970250 / 8000
2021 Chlorine MR 24 SDWIS / IL1970250 / 0999
2020 Combined Radium (-226 and -228) MR 4 SDWIS / IL1970250 / 4010
2020 CYANIDE MR 3 SDWIS / IL1970250 / 1024
2001 Coliform (TCR) MCL 17 SDWIS / IL1970250 / 3100
1997 Coliform (TCR) MR 5 SDWIS / IL1970250 / 3100
1992 Carbon tetrachloride MR 6 SDWIS / IL1970250 / 2982
1992 Trichloroethylene MR 6 SDWIS / IL1970250 / 2984

How Crest Hill Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Crest Hill Illinois avg Federal benchmark
Total violations 190 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 29 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 7 compounds 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 21,169 2,458 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Crest Hill water safe to drink? ▼
Crest Hill (PWS ID: IL1970250) has 190 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 7 PFAS compounds found. This system serves 21,169 people using Groundwater sources.
How many people does Crest Hill serve? ▼
Crest Hill serves 21,169 people in Crest Hill, Illinois. It is a Local-owned system using Groundwater water sources with 6,500 service connections.
What type of violations does Crest Hill have? ▼
Crest Hill has 190 total violations: 29 health-based violations (MCL exceedances or treatment failures), 126 monitoring/reporting violations, and 12 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Crest Hill water? ▼
Yes. UCMR5 testing detected 7 PFAS compounds in Crest Hill's water supply: PFBA, PFPeA, PFBS, PFHpA, PFHxS, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Crest Hill use? ▼
Crest Hill uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.