PlainWater
Counties → Illinois

Grundy County, Illinois

Water Systems
63
Population Served
52,209
Total Violations
12,515
1,361 health-based
PFAS Detected
5
of 5 tested

Violation Analysis

90.5%
Systems with Violations
198.7
Avg Violations per System
10.9%
Health-Based Violations

Water Source Types

GW
48 systems (76%)
SW
2 systems (3%)

PFAS Contamination

5
Systems Tested
5
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

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

No violations on record (1) One or more violations (49)

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
Morris 14,775 108 Clean
Minooka 12,800 266 Detected
Coal City 5,749 621 Clean
Diamond 2,508 346 -
Coal City Area Club 2,500 17 -
Gardner 1,361 322 -
Mazon 994 65 -
Shady Oaks MHP 912 262 Clean
Constellation Dresden Station 811 13 -
Braceville 800 210 -
First Christian Church (138818) 800 5 -
South Wilmington 700 198 -
Equistar Chemicals LP 600 62 -
Burt Estates Mhc 543 4 -
Bookwalter Woods MHP 504 33 Clean
South Wilmington Firemans #1 500 37 -
Express Lane Gas and Food Inc. 400 10 -
Indian Creek Office Well 390 10 -
Carbon Hill 370 1,635 -
Rainbow Council Scout Res Main 350 18 -
IL American-Nettle Creek 317 1 -
Grundy County Fairgrounds 300 14 -
Downers Grove Sportsman Club 300 14 -
Grundy County Fairgrl N Well 300 10 -
Indian Creek Pool Well 210 9 -
IL American-Ridgecrest 203 26 -
Honest Abes Tap and Grill 162 15 -
Ceco Recreation Association 125 20 -
Polynt Composites USA, Inc 120 482 -
Prairie Oaks Ests Homeowners Assn 107 151 -
Grundy County Rod & Gun Club 100 9 -
Loyal Order of Moose #967 100 4 -
Nouryon Surface Chemistry LLC 100 358 -
Twice the Ice Ice House Coal City 100 0 -
Kinsman 99 431 -
Heatherfield Subdivision 90 39 -
South Wilmington Firemans #2 75 27 -
Hatcher Recreation Area 75 15 -
First Christian Church Pre-Sch 75 5 -
E J Karzs 75 8 -
Northfield Block Company 2 75 1,750 -
Northfield Block Company 3 75 1,690 -
Ridgecrest North Subdivision 60 121 -
Nettle Creek School 50 199 -
Aux Sable Liquid Products Inc 50 119 -
Hawthorn Estates Subdivision 49 18 -
Indian Creek Lower Well 45 9 -
Recos Roadhouse 30 11 -
Lisbon North, Inc. 25 173 -
Goose Lake Club 25 19 -

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 Grundy County? ▼
Grundy County has 12,515 total drinking water violations across 63 water systems, of which 1,361 are health-based violations. 90.5% of systems have at least one violation.
How many people get water from Grundy County systems? ▼
Water systems in Grundy County serve approximately 52,209 people through 63 public water systems.
Has PFAS been detected in Grundy County water? ▼
Of 5 water systems tested for PFAS in Grundy County, 5 had PFAS detected (100.0% detection rate).
What types of water sources supply Grundy County? ▼
Water systems in Grundy County use GW (48 systems), SW (2 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. 10.9% of Grundy 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.