PlainWater
Counties → Illinois

Shelby County, Illinois

Water Systems
13
Population Served
12,657
Total Violations
1,078
188 health-based
PFAS Detected
0
of 1 tested

Violation Analysis

84.6%
Systems with Violations
82.9
Avg Violations per System
17.4%
Health-Based Violations

Water Source Types

GW
10 systems (77%)
SW
3 systems (23%)

PFAS Contamination

1
Systems Tested
0
PFAS Detected
0.0%
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

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

No violations on record (2) One or more violations (11)

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
Shelbyville 6,174 11 Clean
Moweaqua 1,785 5 -
Windsor 1,200 71 -
Findlay 750 303 -
Stewardson 747 27 -
Cowden 612 25 -
Tower Hill 500 84 -
Sigel 386 23 -
Herrick 358 519 -
Knobs Baptist Church 70 7 -
Prairie Pure Vending 25 3 -
Walmart #4259 25 0 -
Twice the Ice Shelbyville 25 0 -

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 Shelby County? ▼
Shelby County has 1,078 total drinking water violations across 13 water systems, of which 188 are health-based violations. 84.6% of systems have at least one violation.
How many people get water from Shelby County systems? ▼
Water systems in Shelby County serve approximately 12,657 people through 13 public water systems.
Has PFAS been detected in Shelby County water? ▼
Of 1 water systems tested for PFAS in Shelby County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Shelby County? ▼
Water systems in Shelby County use GW (10 systems), SW (3 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. 17.4% of Shelby 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.