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Community Water System · PWS IL1775235

Stephenson Mobile Estates

Freeport, Illinois 61032 - drinking water served from groundwater sources to 128 people, tracked in EPA SDWIS and UCMR5.

128
People served
230
EPA violations
11
Health-based
Untested
UCMR5 result

The verdict

EPA records 230 drinking-water violations at Stephenson Mobile Estates, 5% of them health-based - above the Illinois per-system average.

230
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
128
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Stephenson Mobile Estates

Stephenson Mobile Estates is a private-owned community water system that delivers drinking water to 128 residents in Freeport, Illinois (Stephenson County) through 51 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 230 total violations for this system , of which 11 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 179 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 18 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, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Stephenson Mobile Estates's 230 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
128
Total Violations
230
Health-Based Violations
11
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
51
County
Stephenson
School/Daycare
No
MCL Violations
11
Monitoring Violations
179
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 18 1998
Coliform (TCR) MCL 11 1998
Nitrate MR 9 2017
Chlorine MR 8 2019
p-Dichlorobenzene MR 6 1993
1,1-Dichloroethylene MR 6 1993
trans-1,2-Dichloroethylene MR 6 1993
1,2-Dichloroethane MR 6 1993
Trichloroethylene MR 6 1993
Tetrachloroethylene MR 6 1993
CHLOROBENZENE MR 6 1993
Benzene MR 6 1993
Toluene MR 6 1993
Ethylbenzene MR 6 1993
Styrene MR 6 1993
Consumer Confidence Rule Other 6 2023
o-Dichlorobenzene MR 6 1993
cis-1,2-Dichloroethylene MR 6 1993
1,2-Dichloropropane MR 6 1993
Carbon tetrachloride MR 6 1993
Xylenes, Total MR 6 1993
1,1,1-Trichloroethane MR 6 1993
Arsenic MR 5 1993
Barium MR 5 1993
Cadmium MR 5 1993
Selenium MR 5 1993
Chromium MR 5 1993
Mercury MR 5 1993
Fluoride MR 5 1993
Revised Total Coliform Rule MON 4 2018

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 Stephenson Mobile Estates.

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 IL1775235 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 Stephenson Mobile Estates 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
2023 Consumer Confidence Rule Other 6 SDWIS / IL1775235 / 7000
2020 Public Notice Other 2 SDWIS / IL1775235 / 7500
2019 Chlorine MR 8 SDWIS / IL1775235 / 0999
2018 Revised Total Coliform Rule MON 4 SDWIS / IL1775235 / 8000
2017 Nitrate MR 9 SDWIS / IL1775235 / 1040
1998 Coliform (TCR) MR 18 SDWIS / IL1775235 / 3100
1998 Coliform (TCR) MCL 11 SDWIS / IL1775235 / 3100
1995 Lead and Copper Rule MR 3 SDWIS / IL1775235 / 5000
1993 p-Dichlorobenzene MR 6 SDWIS / IL1775235 / 2969
1993 1,1-Dichloroethylene MR 6 SDWIS / IL1775235 / 2977
1993 trans-1,2-Dichloroethylene MR 6 SDWIS / IL1775235 / 2979
1993 1,2-Dichloroethane MR 6 SDWIS / IL1775235 / 2980
1993 Trichloroethylene MR 6 SDWIS / IL1775235 / 2984
1993 Tetrachloroethylene MR 6 SDWIS / IL1775235 / 2987
1993 CHLOROBENZENE MR 6 SDWIS / IL1775235 / 2989

How Stephenson Mobile Estates Compares

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

Metric Stephenson Mobile Estates Illinois avg Federal benchmark
Total violations 230 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 11 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 128 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 Stephenson Mobile Estates water safe to drink? ▼
Stephenson Mobile Estates (PWS ID: IL1775235) has 230 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 128 people using Groundwater sources.
How many people does Stephenson Mobile Estates serve? ▼
Stephenson Mobile Estates serves 128 people in Freeport, Illinois. It is a Private-owned system using Groundwater water sources with 51 service connections.
What type of violations does Stephenson Mobile Estates have? ▼
Stephenson Mobile Estates has 230 total violations: 11 health-based violations (MCL exceedances or treatment failures), 179 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Stephenson Mobile Estates water? ▼
No PFAS testing data is available for Stephenson Mobile Estates under the EPA's UCMR5 monitoring program.
What water source does Stephenson Mobile Estates use? ▼
Stephenson Mobile Estates 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.