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Counties → Illinois

Rock Island County, Illinois

Water Systems
120
Population Served
164,178
Total Violations
6,591
731 health-based
PFAS Detected
9
of 9 tested

Violation Analysis

93.3%
Systems with Violations
54.9
Avg Violations per System
11.1%
Health-Based Violations

Water Source Types

GW
40 systems (33%)
SW
10 systems (8%)

PFAS Contamination

9
Systems Tested
9
PFAS Detected
100.0%
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

Rock Island 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
Moline 44,500 14 Detected
Rock Island 39,018 145 Detected
East Moline 21,374 95 Detected
Rock Island Arsenal, US Army 7,800 46 Detected
Silvis 7,473 278 Clean
Niabi Zoo 5,000 25 -
Milan 4,945 161 Clean
Coal Valley 3,873 24 Clean
Carbon Cliff 2,134 132 -
Tyson Fresh Meats Inc 2,100 23 -
Hampton 1,863 93 -
Port Byron 1,678 44 -
Silvis Heights Water Corp 1,450 147 -
Riverdale School District #100 1,340 356 -
IL American-Andalusia 1,184 22 Clean
Rapids City 962 66 -
Constellation Energy Generation LLC 950 6 -
Mississippi Rapids Rest Area 930 2 -
Hillsdale Express Lane 900 1 -
Sherrard JR/SR High School 800 64 Clean
Clover Leaf Village MHP 732 70 -
Cordova 640 83 -
Reynolds 508 48 -
Mississippi Manufactured Home Community 503 19 -
East Moline Correctional Center 500 3 -
Croppers 1st 4th and 5th Addition 495 26 -
Woodland a and B MHP 490 80 -
Cedar Brook Estates Subdivision 450 19 -
High Cliff Estates 448 8 -
Wildwood Baptist Church 440 4 -
Edgington Water District 391 30 -
Falcon Farms 350 59 -
Greater Quad City Auto Auction 340 96 -
Snowstar Inc 320 8 -
Ridgewood Ledges Water Association 300 36 -
3M Chemical Operations LLC 300 240 -
Quad City Hitmen Sports Complex 300 3 -
Air View MHP 200 93 -
Paradise Manor MHP 200 72 -
Golfmohr Golf Course 200 11 -
Faith Walk World Outreach/Cntr 200 3 -
Illinois City Untd Methodist Church 200 1 -
Hillsdale Estates, LLC 163 656 -
Taylor Ridge Elementary School 162 180 -
East Lawn Water Association 160 37 -
Coyne Center Coop 150 20 -
Duckys Lagoon 150 29 -
Ilcv Candle MHP, LLC 148 153 -
Tower Ridge Subdivision 147 109 -
Indian Bluffs Subdivision 138 48 -

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 Rock Island County? ▼
Rock Island County has 6,591 total drinking water violations across 120 water systems, of which 731 are health-based violations. 93.3% of systems have at least one violation.
How many people get water from Rock Island County systems? ▼
Water systems in Rock Island County serve approximately 164,178 people through 120 public water systems.
Has PFAS been detected in Rock Island County water? ▼
Of 9 water systems tested for PFAS in Rock Island County, 9 had PFAS detected (100.0% detection rate).
What types of water sources supply Rock Island County? ▼
Water systems in Rock Island County use GW (40 systems), SW (10 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. 11.1% of Rock Island 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.