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Community Water System · PWS IL2015425

Clarks MHP

Rockford, Illinois 61102 - drinking water served from groundwater sources to 90 people, tracked in EPA SDWIS and UCMR5.

90
People served
372
EPA violations
13
Health-based
Untested
UCMR5 result

The verdict

EPA records 372 drinking-water violations at Clarks MHP, 3% of them health-based - above the Illinois per-system average.

372
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
90
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Clarks MHP

Clarks MHP is a private-owned community water system that delivers drinking water to 90 residents in Rockford, Illinois (Winnebago County) through 36 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 372 total violations for this system , of which 13 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 310 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 Coliform (TCR), recorded in 24 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%).

Clarks MHP's 372 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
90
Total Violations
372
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
36
County
Winnebago
School/Daycare
No
MCL Violations
13
Monitoring Violations
310
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 24 1998
Nitrate MR 18 2007
Coliform (TCR) MCL 13 1998
cis-1,2-Dichloroethylene MR 13 1995
p-Dichlorobenzene MR 13 1995
1,1-Dichloroethylene MR 13 1995
trans-1,2-Dichloroethylene MR 13 1995
1,2-Dichloroethane MR 13 1995
1,1,1-Trichloroethane MR 13 1995
Carbon tetrachloride MR 13 1995
1,2-Dichloropropane MR 13 1995
Trichloroethylene MR 13 1995
Tetrachloroethylene MR 13 1995
Benzene MR 13 1995
Toluene MR 13 1995
Styrene MR 13 1995
o-Dichlorobenzene MR 13 1995
CHLOROBENZENE MR 13 1995
Ethylbenzene MR 13 1995
Xylenes, Total MR 13 1995
1,2,4-Trichlorobenzene MR 11 1995
DICHLOROMETHANE MR 11 1995
1,1,2-Trichloroethane MR 11 1995
Consumer Confidence Rule Other 6 2024
Nitrate-Nitrite MR 5 2000
Lead and Copper Rule MR 3 2000
Gross Alpha, Excl. Radon and U MR 2 1997
Combined Radium (-226 and -228) MR 2 1997
Chlorine MR 2 2009

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 Clarks 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 IL2015425 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 Clarks 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
2024 Consumer Confidence Rule Other 6 SDWIS / IL2015425 / 7000
2009 Chlorine MR 2 SDWIS / IL2015425 / 0999
2007 Nitrate MR 18 SDWIS / IL2015425 / 1040
2000 Nitrate-Nitrite MR 5 SDWIS / IL2015425 / 1038
2000 Lead and Copper Rule MR 3 SDWIS / IL2015425 / 5000
1998 Coliform (TCR) MR 24 SDWIS / IL2015425 / 3100
1998 Coliform (TCR) MCL 13 SDWIS / IL2015425 / 3100
1997 Gross Alpha, Excl. Radon and U MR 2 SDWIS / IL2015425 / 4000
1997 Combined Radium (-226 and -228) MR 2 SDWIS / IL2015425 / 4010
1995 cis-1,2-Dichloroethylene MR 13 SDWIS / IL2015425 / 2380
1995 p-Dichlorobenzene MR 13 SDWIS / IL2015425 / 2969
1995 1,1-Dichloroethylene MR 13 SDWIS / IL2015425 / 2977
1995 trans-1,2-Dichloroethylene MR 13 SDWIS / IL2015425 / 2979
1995 1,2-Dichloroethane MR 13 SDWIS / IL2015425 / 2980
1995 1,1,1-Trichloroethane MR 13 SDWIS / IL2015425 / 2981

How Clarks MHP Compares

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

Metric Clarks MHP Illinois avg Federal benchmark
Total violations 372 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 13 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 90 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 Clarks MHP water safe to drink? ▼
Clarks MHP (PWS ID: IL2015425) has 372 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 90 people using Groundwater sources.
How many people does Clarks MHP serve? ▼
Clarks MHP serves 90 people in Rockford, Illinois. It is a Private-owned system using Groundwater water sources with 36 service connections.
What type of violations does Clarks MHP have? ▼
Clarks MHP has 372 total violations: 13 health-based violations (MCL exceedances or treatment failures), 310 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Clarks MHP water? ▼
No PFAS testing data is available for Clarks MHP under the EPA's UCMR5 monitoring program.
What water source does Clarks MHP use? ▼
Clarks 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.