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Community Water System · PWS IL1135265

Westwind Estates

Pontiac, Illinois 61764 - drinking water served from groundwater sources to 120 people, tracked in EPA SDWIS and UCMR5.

120
People served
224
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 224 drinking-water violations at Westwind Estates, 2% of them health-based - above the Illinois per-system average.

224
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
120
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Westwind Estates

Westwind Estates is a private-owned community water system that delivers drinking water to 120 residents in Pontiac, Illinois (McLean County) through 44 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 224 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 187 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 Coliform (TCR), recorded in 20 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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, 123 of 487 UCMR5-tested systems have reported PFAS detections (25.3%).

Westwind Estates's 224 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.

Population Served
120
Total Violations
224
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
44
County
McLean
School/Daycare
No
MCL Violations
4
Monitoring Violations
187
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 20 2008
cis-1,2-Dichloroethylene MR 7 1994
Xylenes, Total MR 7 1994
1,1-Dichloroethylene MR 7 1994
Carbon tetrachloride MR 7 1994
1,2-Dichloropropane MR 7 1994
CHLOROBENZENE MR 7 1994
Benzene MR 7 1994
Toluene MR 7 1994
Ethylbenzene MR 7 1994
Styrene MR 7 1994
1,2-Dichloroethane MR 7 1994
1,1,1-Trichloroethane MR 7 1994
Tetrachloroethylene MR 7 1994
trans-1,2-Dichloroethylene MR 7 1994
p-Dichlorobenzene MR 7 1994
o-Dichlorobenzene MR 7 1994
Trichloroethylene MR 7 1994
Revised Total Coliform Rule MON 5 2025
Cadmium MR 4 1987
Consumer Confidence Rule Other 4 2002
Coliform (TCR) MCL 4 2008
Chromium MR 4 1987
Fluoride MR 4 1987
Mercury MR 4 1987
Selenium MR 4 1987
Barium MR 4 1987
Nitrate MR 4 1987
Arsenic MR 4 1987
1,1,2-Trichloroethane MR 3 1994

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 Westwind 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 IL1135265 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 Westwind 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
2025 Revised Total Coliform Rule MON 5 SDWIS / IL1135265 / 8000
2008 Coliform (TCR) MR 20 SDWIS / IL1135265 / 3100
2008 Coliform (TCR) MCL 4 SDWIS / IL1135265 / 3100
2002 Consumer Confidence Rule Other 4 SDWIS / IL1135265 / 7000
1994 cis-1,2-Dichloroethylene MR 7 SDWIS / IL1135265 / 2380
1994 Xylenes, Total MR 7 SDWIS / IL1135265 / 2955
1994 1,1-Dichloroethylene MR 7 SDWIS / IL1135265 / 2977
1994 Carbon tetrachloride MR 7 SDWIS / IL1135265 / 2982
1994 1,2-Dichloropropane MR 7 SDWIS / IL1135265 / 2983
1994 CHLOROBENZENE MR 7 SDWIS / IL1135265 / 2989
1994 Benzene MR 7 SDWIS / IL1135265 / 2990
1994 Toluene MR 7 SDWIS / IL1135265 / 2991
1994 Ethylbenzene MR 7 SDWIS / IL1135265 / 2992
1994 Styrene MR 7 SDWIS / IL1135265 / 2996
1994 1,2-Dichloroethane MR 7 SDWIS / IL1135265 / 2980

How Westwind Estates Compares

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

Metric Westwind Estates Illinois avg Federal benchmark
Total violations 224 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 120 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 Westwind Estates water safe to drink? ▼
Westwind Estates (PWS ID: IL1135265) has 224 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Groundwater sources.
How many people does Westwind Estates serve? ▼
Westwind Estates serves 120 people in Pontiac, Illinois. It is a Private-owned system using Groundwater water sources with 44 service connections.
What type of violations does Westwind Estates have? ▼
Westwind Estates has 224 total violations: 4 health-based violations (MCL exceedances or treatment failures), 187 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Westwind Estates water? ▼
No PFAS testing data is available for Westwind Estates under the EPA's UCMR5 monitoring program.
What water source does Westwind Estates use? ▼
Westwind Estates 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. 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.