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Counties → Illinois

Coles County, Illinois

Water Systems
16
Population Served
57,953
Total Violations
520
85 health-based
PFAS Detected
2
of 5 tested

Violation Analysis

87.5%
Systems with Violations
32.5
Avg Violations per System
16.3%
Health-Based Violations

Water Source Types

SW
9 systems (56%)
GW
7 systems (44%)

PFAS Contamination

5
Systems Tested
2
PFAS Detected
40.0%
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

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

No violations on record (2) One or more violations (14)

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
Mattoon 19,500 71 Detected
Charleston 17,286 35 Detected
Clear Water Service Corp 8,900 19 Clean
Eastern Illinois University 5,500 46 Clean
Embarras Area Water District 3,750 32 Clean
Oakland 739 39 -
Cooks Mills Water Association 720 27 -
Ashmore 637 72 -
Longacre Estates MHP 375 78 -
Humboldt 361 81 -
Walmart Mattoon 50 0 -
Shiney Hiney Wash Co 35 6 -
County Market #450 25 3 -
Walmart Supercenter #0612 25 0 -
Champion Ice Mattoon 25 8 -
Twice the Ice Charleston 25 3 -

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 Coles County? ▼
Coles County has 520 total drinking water violations across 16 water systems, of which 85 are health-based violations. 87.5% of systems have at least one violation.
How many people get water from Coles County systems? ▼
Water systems in Coles County serve approximately 57,953 people through 16 public water systems.
Has PFAS been detected in Coles County water? ▼
Of 5 water systems tested for PFAS in Coles County, 2 had PFAS detected (40.0% detection rate).
What types of water sources supply Coles County? ▼
Water systems in Coles County use SW (9 systems), GW (7 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. 16.3% of Coles 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.