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Non-Transient Non-Community Water System · PWS IL3114454

Rockford Mutual Insurance Co

Sterling, Illinois 61081 - drinking water served from groundwater sources to 125 people, tracked in EPA SDWIS and UCMR5.

125
People served
417
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 417 drinking-water violations at Rockford Mutual Insurance Co - above the Illinois per-system average.

417
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
125
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rockford Mutual Insurance Co

Rockford Mutual Insurance Co is a private-owned non-transient non-community water system that delivers drinking water to 125 residents in Sterling, Illinois (Winnebago County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 417 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 417 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 9 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%).

Rockford Mutual Insurance Co's 417 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
125
Total Violations
417
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Winnebago
School/Daycare
No
MCL Violations
0
Monitoring Violations
417
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 9 2014
cis-1,2-Dichloroethylene MR 9 2014
p-Dichlorobenzene MR 9 2014
Vinyl chloride MR 9 2014
trans-1,2-Dichloroethylene MR 9 2014
1,1,1-Trichloroethane MR 9 2014
Carbon tetrachloride MR 9 2014
1,2-Dichloropropane MR 9 2014
Trichloroethylene MR 9 2014
1,1,2-Trichloroethane MR 9 2014
Tetrachloroethylene MR 9 2014
CHLOROBENZENE MR 9 2014
Benzene MR 9 2014
Toluene MR 9 2014
Ethylbenzene MR 9 2014
Methoxychlor MR 9 2014
Carbofuran MR 9 2014
Atrazine MR 9 2014
LASSO MR 9 2014
2,4-D MR 9 2014
1,2-DIBROMO-3-CHLOROPROPANE MR 9 2014
Xylenes, Total MR 9 2014
DICHLOROMETHANE MR 9 2014
o-Dichlorobenzene MR 9 2014
Styrene MR 9 2014
Toxaphene MR 9 2014
Heptachlor epoxide MR 9 2014
Chlordane MR 9 2014
1,1-Dichloroethylene MR 9 2014
BHC-GAMMA MR 9 2014

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 Rockford Mutual Insurance Co.

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 IL3114454 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 Rockford Mutual Insurance Co 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
2014 1,2,4-Trichlorobenzene MR 9 SDWIS / IL3114454 / 2378
2014 cis-1,2-Dichloroethylene MR 9 SDWIS / IL3114454 / 2380
2014 p-Dichlorobenzene MR 9 SDWIS / IL3114454 / 2969
2014 Vinyl chloride MR 9 SDWIS / IL3114454 / 2976
2014 trans-1,2-Dichloroethylene MR 9 SDWIS / IL3114454 / 2979
2014 1,1,1-Trichloroethane MR 9 SDWIS / IL3114454 / 2981
2014 Carbon tetrachloride MR 9 SDWIS / IL3114454 / 2982
2014 1,2-Dichloropropane MR 9 SDWIS / IL3114454 / 2983
2014 Trichloroethylene MR 9 SDWIS / IL3114454 / 2984
2014 1,1,2-Trichloroethane MR 9 SDWIS / IL3114454 / 2985
2014 Tetrachloroethylene MR 9 SDWIS / IL3114454 / 2987
2014 CHLOROBENZENE MR 9 SDWIS / IL3114454 / 2989
2014 Benzene MR 9 SDWIS / IL3114454 / 2990
2014 Toluene MR 9 SDWIS / IL3114454 / 2991
2014 Ethylbenzene MR 9 SDWIS / IL3114454 / 2992

How Rockford Mutual Insurance Co Compares

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

Metric Rockford Mutual Insurance Co Illinois avg Federal benchmark
Total violations 417 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 125 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 Rockford Mutual Insurance Co water safe to drink? ▼
Rockford Mutual Insurance Co (PWS ID: IL3114454) has 417 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 125 people using Groundwater sources.
How many people does Rockford Mutual Insurance Co serve? ▼
Rockford Mutual Insurance Co serves 125 people in Sterling, Illinois. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Rockford Mutual Insurance Co have? ▼
Rockford Mutual Insurance Co has 417 total violations: 0 health-based violations (MCL exceedances or treatment failures), 417 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rockford Mutual Insurance Co water? ▼
No PFAS testing data is available for Rockford Mutual Insurance Co under the EPA's UCMR5 monitoring program.
What water source does Rockford Mutual Insurance Co use? ▼
Rockford Mutual Insurance Co uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.