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Community Water System · PWS IL0977320

Wadsworth Oaks Subdivision

Wadsworth, Illinois 60083 - drinking water served from groundwater sources to 185 people, tracked in EPA SDWIS and UCMR5.

185
People served
75
EPA violations
47
Health-based
Untested
UCMR5 result

The verdict

EPA records 75 drinking-water violations at Wadsworth Oaks Subdivision, 63% of them health-based - above the Illinois per-system average.

75
Total EPA violations on record
63%
Health-based (MCL / treatment failure)
185
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wadsworth Oaks Subdivision

Wadsworth Oaks Subdivision is a local-owned community water system that delivers drinking water to 185 residents in Wadsworth, Illinois (Lake County) through 63 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 75 total violations for this system , of which 47 (63%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 18 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Combined Radium (-226 and -228), recorded in 39 violations (MCL, health-based). 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%).

Wadsworth Oaks Subdivision's 75 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
185
Total Violations
75
Health-Based Violations
47
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
63
County
Lake
School/Daycare
No
MCL Violations
47
Monitoring Violations
18
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 39 1994
Gross Alpha, Excl. Radon and U MCL 8 1992
Consumer Confidence Rule Other 6 2024
Glyphosate MR 4 2014
Endothall MR 4 2014
Nitrite MR 4 2014
Diquat MR 4 2014
Combined Radium (-226 and -228) MR 1 1999
Gross Alpha, Excl. Radon and U MR 1 1999

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 Wadsworth Oaks Subdivision.

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 IL0977320 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 Wadsworth Oaks Subdivision 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
2024 Consumer Confidence Rule Other 6 SDWIS / IL0977320 / 7000
2014 Glyphosate MR 4 SDWIS / IL0977320 / 2034
2014 Endothall MR 4 SDWIS / IL0977320 / 2033
2014 Nitrite MR 4 SDWIS / IL0977320 / 1041
2014 Diquat MR 4 SDWIS / IL0977320 / 2032
1999 Combined Radium (-226 and -228) MR 1 SDWIS / IL0977320 / 4010
1999 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IL0977320 / 4000
1994 Combined Radium (-226 and -228) MCL 39 SDWIS / IL0977320 / 4010
1992 Gross Alpha, Excl. Radon and U MCL 8 SDWIS / IL0977320 / 4000

How Wadsworth Oaks Subdivision Compares

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

Metric Wadsworth Oaks Subdivision Illinois avg Federal benchmark
Total violations 75 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 47 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 185 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 Wadsworth Oaks Subdivision water safe to drink? ▼
Wadsworth Oaks Subdivision (PWS ID: IL0977320) has 75 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 185 people using Groundwater sources.
How many people does Wadsworth Oaks Subdivision serve? ▼
Wadsworth Oaks Subdivision serves 185 people in Wadsworth, Illinois. It is a Local-owned system using Groundwater water sources with 63 service connections.
What type of violations does Wadsworth Oaks Subdivision have? ▼
Wadsworth Oaks Subdivision has 75 total violations: 47 health-based violations (MCL exceedances or treatment failures), 18 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wadsworth Oaks Subdivision water? ▼
No PFAS testing data is available for Wadsworth Oaks Subdivision under the EPA's UCMR5 monitoring program.
What water source does Wadsworth Oaks Subdivision use? ▼
Wadsworth Oaks Subdivision 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.