PlainWater
States → Illinois

Community Water System · PWS IL0890500

Maple Park

Maple Park, Illinois 60151 - drinking water served from groundwater sources to 1,484 people, tracked in EPA SDWIS and UCMR5.

1,484
People served
210
EPA violations
94
Health-based
Untested
UCMR5 result

The verdict

EPA records 210 drinking-water violations at Maple Park, 45% of them health-based - above the Illinois per-system average.

210
Total EPA violations on record
45%
Health-based (MCL / treatment failure)
1,484
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Maple Park

Maple Park is a local-owned community water system that delivers drinking water to 1,484 residents in Maple Park, Illinois (Kane County) through 594 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 210 total violations for this system , of which 94 (45%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 77 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 Combined Radium (-226 and -228), recorded in 75 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, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Maple Park's 210 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
1,484
Total Violations
210
Health-Based Violations
94
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
594
County
Kane
School/Daycare
No
MCL Violations
94
Monitoring Violations
77
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 75 2025
Coliform (TCR) MR 32 2011
Barium MCL 13 1990
TTHM MR 9 2024
Total Haloacetic Acids (HAA5) MR 9 2024
Chlorine MR 8 2024
Coliform (TCR) MCL 6 1996
Combined Radium (-226 and -228) MR 6 2024
OXAMYL MR 4 2017
Revised Total Coliform Rule MON 4 2024
Carbofuran MR 4 2017
Consumer Confidence Rule Other 2 2021
LEAD AND COPPER RULE REVISIONS RPT 2 2025
Public Notice Other 2 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 Maple Park.

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 IL0890500 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 Maple Park 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 Combined Radium (-226 and -228) MCL 75 SDWIS / IL0890500 / 4010
2025 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / IL0890500 / 5200
2025 Public Notice Other 2 SDWIS / IL0890500 / 7500
2024 TTHM MR 9 SDWIS / IL0890500 / 2950
2024 Total Haloacetic Acids (HAA5) MR 9 SDWIS / IL0890500 / 2456
2024 Chlorine MR 8 SDWIS / IL0890500 / 0999
2024 Combined Radium (-226 and -228) MR 6 SDWIS / IL0890500 / 4010
2024 Revised Total Coliform Rule MON 4 SDWIS / IL0890500 / 8000
2021 Consumer Confidence Rule Other 2 SDWIS / IL0890500 / 7000
2017 OXAMYL MR 4 SDWIS / IL0890500 / 2036
2017 Carbofuran MR 4 SDWIS / IL0890500 / 2046
2011 Coliform (TCR) MR 32 SDWIS / IL0890500 / 3100
1996 Coliform (TCR) MCL 6 SDWIS / IL0890500 / 3100
1990 Barium MCL 13 SDWIS / IL0890500 / 1010
1977 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IL0890500 / 4000

How Maple Park Compares

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

Metric Maple Park Illinois avg Federal benchmark
Total violations 210 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 94 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 1,484 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 Maple Park water safe to drink? ▼
Maple Park (PWS ID: IL0890500) has 210 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,484 people using Groundwater sources.
How many people does Maple Park serve? ▼
Maple Park serves 1,484 people in Maple Park, Illinois. It is a Local-owned system using Groundwater water sources with 594 service connections.
What type of violations does Maple Park have? ▼
Maple Park has 210 total violations: 94 health-based violations (MCL exceedances or treatment failures), 77 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Maple Park water? ▼
No PFAS testing data is available for Maple Park under the EPA's UCMR5 monitoring program.
What water source does Maple Park use? ▼
Maple Park 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.