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Community Water System · PWS IL0975380

Duck Lake Well Owners Association

Ingleside, Illinois 60041 - drinking water served from groundwater sources to 141 people, tracked in EPA SDWIS and UCMR5.

141
People served
48
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 48 drinking-water violations at Duck Lake Well Owners Association, 4% of them health-based - below the Illinois per-system average.

48
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
141
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Duck Lake Well Owners Association

Duck Lake Well Owners Association is a private-owned community water system that delivers drinking water to 141 residents in Ingleside, Illinois (Lake County) through 47 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 48 total violations for this system , of which 2 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 9 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 Nitrate, recorded in 4 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%).

Duck Lake Well Owners Association's 48 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
141
Total Violations
48
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
47
County
Lake
School/Daycare
No
MCL Violations
0
Monitoring Violations
9
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 4 2003
Chlorine MR 4 2009
LEAD AND COPPER RULE REVISIONS RPT 4 2025
Consumer Confidence Rule Other 3 2025
LEAD AND COPPER RULE REVISIONS TT 2 2024
Public Notice Other 1 2025
Gross Alpha, Excl. Radon and U MR 1 1977

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 Duck Lake Well Owners Association.

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 IL0975380 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 Duck Lake Well Owners Association 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 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / IL0975380 / 5200
2025 Consumer Confidence Rule Other 3 SDWIS / IL0975380 / 7000
2025 Public Notice Other 1 SDWIS / IL0975380 / 7500
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / IL0975380 / 5200
2009 Chlorine MR 4 SDWIS / IL0975380 / 0999
2003 Nitrate MR 4 SDWIS / IL0975380 / 1040
1977 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IL0975380 / 4000

How Duck Lake Well Owners Association Compares

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

Metric Duck Lake Well Owners Association Illinois avg Federal benchmark
Total violations 48 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 141 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 Duck Lake Well Owners Association water safe to drink? ▼
Duck Lake Well Owners Association (PWS ID: IL0975380) has 48 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 141 people using Groundwater sources.
How many people does Duck Lake Well Owners Association serve? ▼
Duck Lake Well Owners Association serves 141 people in Ingleside, Illinois. It is a Private-owned system using Groundwater water sources with 47 service connections.
What type of violations does Duck Lake Well Owners Association have? ▼
Duck Lake Well Owners Association has 48 total violations: 2 health-based violations (MCL exceedances or treatment failures), 9 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Duck Lake Well Owners Association water? ▼
No PFAS testing data is available for Duck Lake Well Owners Association under the EPA's UCMR5 monitoring program.
What water source does Duck Lake Well Owners Association use? ▼
Duck Lake Well Owners Association 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.