PlainWater
Counties → Illinois

LaSalle County, Illinois

Water Systems
174
Population Served
112,392
Total Violations
13,172
4,033 health-based
PFAS Detected
7
of 8 tested

Violation Analysis

91.4%
Systems with Violations
75.7
Avg Violations per System
30.6%
Health-Based Violations

Water Source Types

GW
49 systems (28%)
SW
1 system (1%)

PFAS Contamination

8
Systems Tested
7
PFAS Detected
87.5%
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

LaSalle 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
IL American-Streator 19,000 71 Detected
Ottawa 18,097 365 Clean
Peru 10,300 37 Clean
La Salle 9,700 219 Detected
Mendota 6,926 171 Clean
Prairie Path Water Company-Lake Holiday 6,601 44 Clean
Marseilles 5,061 158 Clean
Oglesby 4,500 206 Clean
Woodsmoke Ranch 4,000 10 -
Seneca 2,353 151 -
Sheridan Correctional Center 1,670 124 -
Earlville 1,613 27 -
North Utica 1,400 254 -
Grand Bear Lodge Water Pk/Jacks Place 6N 1,005 3 -
Wildwood Estates 1,001 21 -
Constellation/Lasalle Cnty Gen Station 1,000 78 -
Leland 951 16 -
Streator Baptist Camp -Office Well 750 20 -
Tonica 705 129 -
Glenwood RV Resort 600 54 -
Serena Community School 555 98 -
Grand Ridge 515 355 -
Starved Rock State Park (94227) 500 25 -
Naplate 465 477 -
Lostant 463 318 -
Sabic Innovative Plastics 440 18 -
Fields Hill Improvement Association 312 210 -
Lakes Country Club 300 27 -
Illinois Waterway Visitor Ctr 300 6 -
Cedar Point Water Company 266 80 -
Rutland 259 181 -
Four Star Campground 250 410 -
Rolling Oaks Office Well 250 40 -
Harding Grade School 250 374 -
Wallace Consol Comm School 250 245 -
Rolling Oaks Campground (113555) 250 35 -
Jonesville Pwd 243 26 -
Getaway Starved Rock 230 19 -
Sheridan Grade School 227 199 -
Country Acres MHP (la Salle County) 222 500 -
American Nickeloid 200 17 -
Illini State Park 200 18 -
Grand Bear Vac Villas Town Home #1 200 3 -
Retz Addn Improvement Association 168 80 -
Countryside Estates MHP 158 42 -
Deer Park School 155 195 -
Pine Hills Golf Course 150 3 -
Miller Comm Consol Sch 210 150 324 -
Road Ranger LLC Ottawa 150 10 -
Hy-Vee Inc 135 4 -

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 LaSalle County? ▼
LaSalle County has 13,172 total drinking water violations across 174 water systems, of which 4,033 are health-based violations. 91.4% of systems have at least one violation.
How many people get water from LaSalle County systems? ▼
Water systems in LaSalle County serve approximately 112,392 people through 174 public water systems.
Has PFAS been detected in LaSalle County water? ▼
Of 8 water systems tested for PFAS in LaSalle County, 7 had PFAS detected (87.5% detection rate).
What types of water sources supply LaSalle County? ▼
Water systems in LaSalle County use GW (49 systems), SW (1 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. 30.6% of LaSalle 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.