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Community Water System · PWS IL0317775

Des Plaines MHP

Desplaines, Illinois 60018 - drinking water served from groundwater sources to 405 people, tracked in EPA SDWIS and UCMR5.

405
People served
148
EPA violations
29
Health-based
Untested
UCMR5 result

The verdict

EPA records 148 drinking-water violations at Des Plaines MHP, 20% of them health-based - above the Illinois per-system average.

148
Total EPA violations on record
20%
Health-based (MCL / treatment failure)
405
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Des Plaines MHP

Des Plaines MHP is a private-owned community water system that delivers drinking water to 405 residents in Desplaines, Illinois (Cook County) through 162 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 148 total violations for this system , of which 29 (20%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 52 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 28 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%).

Des Plaines MHP's 148 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
405
Total Violations
148
Health-Based Violations
29
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
162
County
Cook
School/Daycare
No
MCL Violations
29
Monitoring Violations
52
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 28 2003
Coliform (TCR) MR 18 2006
Chlorine MR 14 2014
Public Notice Other 8 2023
Lead and Copper Rule MR 6 2012
TTHM MR 4 2018
Total Haloacetic Acids (HAA5) MR 4 2018
Nitrate MR 3 2001
Combined Radium (-226 and -228) MR 3 2025
Gross Alpha, Excl. Radon and U MCL 1 2000

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 Des Plaines MHP.

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 IL0317775 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 Des Plaines MHP 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) MR 3 SDWIS / IL0317775 / 4010
2023 Public Notice Other 8 SDWIS / IL0317775 / 7500
2018 TTHM MR 4 SDWIS / IL0317775 / 2950
2018 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IL0317775 / 2456
2014 Chlorine MR 14 SDWIS / IL0317775 / 0999
2012 Lead and Copper Rule MR 6 SDWIS / IL0317775 / 5000
2006 Coliform (TCR) MR 18 SDWIS / IL0317775 / 3100
2003 Combined Radium (-226 and -228) MCL 28 SDWIS / IL0317775 / 4010
2001 Nitrate MR 3 SDWIS / IL0317775 / 1040
2000 Gross Alpha, Excl. Radon and U MCL 1 SDWIS / IL0317775 / 4000

How Des Plaines MHP Compares

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

Metric Des Plaines MHP Illinois avg Federal benchmark
Total violations 148 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 29 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 405 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 Des Plaines MHP water safe to drink? ▼
Des Plaines MHP (PWS ID: IL0317775) has 148 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 405 people using Groundwater sources.
How many people does Des Plaines MHP serve? ▼
Des Plaines MHP serves 405 people in Desplaines, Illinois. It is a Private-owned system using Groundwater water sources with 162 service connections.
What type of violations does Des Plaines MHP have? ▼
Des Plaines MHP has 148 total violations: 29 health-based violations (MCL exceedances or treatment failures), 52 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Des Plaines MHP water? ▼
No PFAS testing data is available for Des Plaines MHP under the EPA's UCMR5 monitoring program.
What water source does Des Plaines MHP use? ▼
Des Plaines MHP 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.