PlainWater
Counties → Illinois

Winnebago County, Illinois

Water Systems
196
Population Served
255,966
Total Violations
12,949
1,338 health-based
PFAS Detected
4
of 6 tested

Violation Analysis

92.3%
Systems with Violations
66.1
Avg Violations per System
10.3%
Health-Based Violations

Water Source Types

GW
50 systems (26%)

PFAS Contamination

6
Systems Tested
4
PFAS Detected
66.7%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Winnebago Illinois water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (50)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Rockford 147,051 268 Detected
North Park Pwd 35,580 33 Detected
Loves Park 23,335 237 Clean
IL American-South Beloit 7,893 108 Detected
Rockton 7,685 212 Detected
Cherry Valley 4,731 22 Clean
Winnebago 3,000 76 -
Otter Creek Lake Utilities District 2,342 138 -
Pecatonica 2,195 75 -
Prairie Path Water Company-Westlake 1,493 6 -
Durand 1,427 83 -
Prairie Path Water Company-Coventry Hill 882 12 -
Turtle Creek Rest Area 700 11 -
Forest View MHP 650 4 -
Stone Creek School 543 14 -
Mancuso Village Park MHP 537 134 -
South Bluff MHP 507 4 -
Rock Cut St Pk-Beach Well 500 6 -
I-39 Shell Express 500 9 -
Prairie Path Water Company-Wildwood 490 37 -
Ledgewood Elementary School 470 220 -
Prairie Path Water Co-Coventry Creek 388 250 -
Legacy Academy 325 220 -
Pearl Lake RV Resort LLC-Clubhouse 300 10 -
Berean Baptist Church 300 44 -
Pearl Lake RV Resort LLC-Bathhouse 300 12 -
YMCA Camp Winnebago-Standing Bear Well 300 15 -
YMCA Camp Winnebago-Wilderness Well 300 6 -
YMCA Camp Winnebago - Webvillion 300 11 -
Mauh-Nah-Tee-See C C 277 23 -
Rivers Edge Campground 275 4 -
Legend Lakes Water Association 250 31 -
Green Meadow Estates of Rockford LLC 250 285 -
Rockford Speedway Convention C 250 8 -
Lakeside Plaza on Best Road 250 13 -
Bill-Mar Heights MHP 240 199 -
Shirland School 200 31 -
Riveras Fresh Market 200 3 -
Ledges Swim Club 175 31 -
Tpg Pressure, Inc. 151 651 -
Prairie Road Pump Corporation 150 45 -
Atwood Homestead Club House 150 1 -
Blackhawk Farms Raceway 150 7 -
New Milford Express 150 13 -
Forest Hills Diamonds 150 39 -
Pbc Linear 140 1,416 -
Mr Cs Family Restaurant 125 21 -
Rockford Mutual Insurance Co 125 417 -
Aqua Illinois-Sheridan Grove 120 2 -
Deans Illinois Dairies 110 442 -

Other Counties in Illinois

Cook County
427 systems · 5,304,996 served · 21,728 violations
DuPage County
207 systems · 861,775 served · 15,779 violations
Lake County
540 systems · 719,035 served · 33,311 violations
Will County
330 systems · 622,572 served · 37,818 violations
Kane County
191 systems · 592,544 served · 12,844 violations
McHenry County
307 systems · 271,051 served · 11,554 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Winnebago County? ▼
Winnebago County has 12,949 total drinking water violations across 196 water systems, of which 1,338 are health-based violations. 92.3% of systems have at least one violation.
How many people get water from Winnebago County systems? ▼
Water systems in Winnebago County serve approximately 255,966 people through 196 public water systems.
Has PFAS been detected in Winnebago County water? ▼
Of 6 water systems tested for PFAS in Winnebago County, 4 had PFAS detected (66.7% detection rate).
What types of water sources supply Winnebago County? ▼
Water systems in Winnebago County use GW (50 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 10.3% of Winnebago County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

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 page draws directly on 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.