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Community Water System · PWS IL0311290

Hoffman Estates

Hoffman Estates, Illinois 60169 - drinking water served from surface water sources to 50,179 people, tracked in EPA SDWIS and UCMR5.

50,179
People served
42
EPA violations
35
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 42 drinking-water violations at Hoffman Estates, 83% of them health-based - below the Illinois per-system average.

42
Total EPA violations on record
83%
Health-based (MCL / treatment failure)
50,179
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hoffman Estates

Hoffman Estates is a local-owned community water system that delivers drinking water to 50,179 residents in Hoffman Estates, Illinois (Cook County) through 15,742 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 42 total violations for this system , of which 35 (83%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 7 monitoring and reporting violations are on file. The most recent violation on record dates to 1994.

The most frequently cited contaminant at this system is Barium, recorded in 16 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Hoffman Estates's 42 violations sit below 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.

Population Served
50,179
Total Violations
42
Health-Based Violations
35
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
15,742
County
Cook
School/Daycare
No
MCL Violations
35
Monitoring Violations
7
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Barium MCL 16 1986
Gross Alpha, Excl. Radon and U MCL 13 1984
Coliform (TCR) MCL 6 1994
Coliform (TCR) MR 6 1994
Gross Alpha, Excl. Radon and U MR 1 1977

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 9/26/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 9/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 9/26/2023 <7.00 ppt 7.00 ppt Not Detected
9Cl-PF3ONS 9/26/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeS 9/26/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 9/26/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 9/26/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 9/26/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 9/26/2023 <8.00 ppt 8.00 ppt Not Detected
ADONA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/26/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/26/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 9/26/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 9/26/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 9/26/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/26/2023 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 9/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFNA 6/27/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/27/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/27/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/27/2023 <2.00 ppt 2.00 ppt Not Detected
4:2 FTS 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/27/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 6/27/2023 <20.00 ppt 20.00 ppt Not Detected
PFTA 6/27/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 6/27/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 6/27/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 6/27/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/27/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeS 6/27/2023 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 6/27/2023 <5.00 ppt 5.00 ppt Not Detected
PFEESA 6/27/2023 <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 Hoffman Estates.

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 IL0311290 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 Hoffman Estates 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
1994 Coliform (TCR) MCL 6 SDWIS / IL0311290 / 3100
1994 Coliform (TCR) MR 6 SDWIS / IL0311290 / 3100
1986 Barium MCL 16 SDWIS / IL0311290 / 1010
1984 Gross Alpha, Excl. Radon and U MCL 13 SDWIS / IL0311290 / 4000
1977 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IL0311290 / 4000

How Hoffman Estates Compares

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

Metric Hoffman Estates Illinois avg Federal benchmark
Total violations 42 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 35 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 50,179 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 Hoffman Estates water safe to drink? ▼
Hoffman Estates (PWS ID: IL0311290) has 42 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 50,179 people using Surface Water sources.
How many people does Hoffman Estates serve? ▼
Hoffman Estates serves 50,179 people in Hoffman Estates, Illinois. It is a Local-owned system using Surface Water water sources with 15,742 service connections.
What type of violations does Hoffman Estates have? ▼
Hoffman Estates has 42 total violations: 35 health-based violations (MCL exceedances or treatment failures), 7 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hoffman Estates water? ▼
No. Hoffman Estates was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Hoffman Estates use? ▼
Hoffman Estates uses Surface Water 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.