PlainWater
Counties → Illinois

Madison County, Illinois

Water Systems
68
Population Served
268,778
Total Violations
1,940
330 health-based
PFAS Detected
16
of 19 tested

Violation Analysis

69.1%
Systems with Violations
28.5
Avg Violations per System
17.0%
Health-Based Violations

Water Source Types

SW
30 systems (44%)
GW
20 systems (29%)

PFAS Contamination

19
Systems Tested
16
PFAS Detected
84.2%
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

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

No violations on record (7) One or more violations (43)

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
IL American-Alton 46,127 17 Detected
Collinsville 29,500 55 Detected
IL American-Granite City 27,549 3 Detected
Edwardsville 26,808 33 Detected
Troy 16,962 24 Detected
Bethalto 15,210 25 Detected
Glen Carbon 12,618 42 Detected
Highland 10,649 66 Detected
Wood River 10,464 29 Detected
Maryville 10,150 22 Clean
Fosterburg Pwd 7,940 25 Detected
East Alton 5,786 21 Detected
Mitchell Pwd 5,253 29 Detected
North East Central Pwd 3,975 25 Detected
Three County Pwd 3,575 38 -
Tritownship Water District 3,470 77 Clean
Pontoon Beach Pwd 3,325 18 Detected
Olin Winchester LLC 3,250 151 -
Holiday Shores SD 2,840 136 Clean
Southern IL University-Edwardsville 2,817 12 Detected
South Roxana 1,891 39 -
St Jacob 1,835 73 -
Meadowbrook Pwd 1,778 8 -
Grantfork 1,766 84 -
Pierron 1,709 70 -
Roxana 1,509 6 -
Hartford 1,260 25 -
Worden 1,096 25 -
Hamel 1,087 52 -
Marine 1,037 18 -
IL American-Livingston 825 13 -
Alhambra 755 20 -
Moro Pwd 723 61 Detected
Enchanted Village 720 25 -
Forge at the Lake 387 397 -
Meridian Village 339 13 -
Village Green Mobile Home Park 220 39 -
East 30 MHP 218 10 -
University Flats MHP 203 56 -
Quail Run Mobile Home Park 168 28 -
Country Hills Wtr, Inc. 166 4 -
Oak Grove MHP - Madison County 138 7 -
Twice the Ice Hamel 50 0 -
I-55 RV Park 30 8 -
Wal-Mart Supercenter 0435 25 0 -
Schnucks/Homer Adams 25 0 -
Schnucks (142257) 25 0 -
Schnucks/Godfrey 25 0 -
Schnucks Market (142422) 25 0 -
Schnucks Market 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 Madison County? ▼
Madison County has 1,940 total drinking water violations across 68 water systems, of which 330 are health-based violations. 69.1% of systems have at least one violation.
How many people get water from Madison County systems? ▼
Water systems in Madison County serve approximately 268,778 people through 68 public water systems.
Has PFAS been detected in Madison County water? ▼
Of 19 water systems tested for PFAS in Madison County, 16 had PFAS detected (84.2% detection rate).
What types of water sources supply Madison County? ▼
Water systems in Madison County use SW (30 systems), GW (20 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. 17.0% of Madison 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.