PlainWater
Counties → Indiana

Lake County, Indiana

Water Systems
108
Population Served
539,424
Total Violations
12,533
865 health-based
PFAS Detected
5
of 17 tested

Violation Analysis

99.1%
Systems with Violations
116.0
Avg Violations per System
6.9%
Health-Based Violations

Water Source Types

GW
37 systems (34%)
SW
13 systems (12%)

PFAS Contamination

17
Systems Tested
5
PFAS Detected
29.4%
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

Lake Indiana 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
Indiana American Water - Northwest 210,510 15 Clean
Hammond Water Works Department 78,384 38 Clean
Crown Point Water Works 30,000 27 Clean
Schererville Water Department 30,000 23 Clean
East Chicago Water Works 26,370 148 Clean
St. John Municipal Water Utility 25,700 100 Clean
Highland Water Works 23,984 23 Clean
Munster Water Company 23,894 35 Clean
Griffith Water Department 16,893 19 Clean
Dyer Water Department 16,800 12 Clean
Indiana American Water - Lowell 11,908 292 Clean
Cuii - Twin Lakes 8,000 62 Clean
New Chicago Water Works 5,500 31 Clean
Whiting Water Department 4,900 65 Clean
Cedar Lake Water Works 4,600 465 Clean
Cuii - Indiana Water Service 4,200 34 Clean
Pilot/Wendys #448 2,435 312 -
Flying J #653 1,450 387 -
Lowell Commons 1,440 31 -
Aqua Indiana Water Company 1,350 6 -
Cedar Lake - Robins Nest 950 136 -
Apple Valley Utilities, Inc. 712 182 Clean
Luke Oil #293 606 168 -
Winfield Elementary School 546 66 -
Lake Prairie Elementary 540 82 -
Little Calumet River Basin-Artesian Well 500 9 -
Bethel Church Cedar Lake 473 21 -
Dyer Indoor Soccer Arena 302 17 -
Lighthouse Restaurant at Paradise Cove 275 34 -
Schneider Water Department 267 124 -
Lakeshore Subdivision Association, Inc. 265 509 -
Harry Os 220 102 -
Fairway Regional Water District 210 192 -
St. Michael the Archangel Church 200 3 -
Cedar Lake Mobile Home Park 200 1,082 -
Northwest Indiana Islamic Center 199 18 -
Hillside Community Church 190 92 -
Boys and Girls Clubs of NW in-Cedar Lake 160 156 -
Protection of the Virgin Mary Orth Ch 150 13 -
Hanover North Professional Building 150 16 -
Cedar Lake Bible Conference Grounds 150 222 -
Grace Evangelical Lutheran Church 140 4 -
Subway/R.a.k. Holdings LLC 129 15 -
Palmira Golf & Country Club 129 105 -
Holy Name Ch./Grand Tots Daycare 115 25 -
Town of Cedar Lake - Complex & Pumphouse 115 78 -
Ross Baptist Church 110 54 -
Indian Ridge Golf Course 106 112 -
The Sandbar Grill 104 372 -
Tastee Top 104 40 -

Other Counties in Indiana

Marion County
56 systems · 949,929 served · 5,652 violations
Allen County
91 systems · 324,113 served · 5,221 violations
Hamilton County
66 systems · 229,377 served · 6,714 violations
St. Joseph County
221 systems · 218,797 served · 16,354 violations
Vanderburgh County
6 systems · 195,582 served · 332 violations
Clark County
11 systems · 186,708 served · 1,313 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Lake County? ▼
Lake County has 12,533 total drinking water violations across 108 water systems, of which 865 are health-based violations. 99.1% of systems have at least one violation.
How many people get water from Lake County systems? ▼
Water systems in Lake County serve approximately 539,424 people through 108 public water systems.
Has PFAS been detected in Lake County water? ▼
Of 17 water systems tested for PFAS in Lake County, 5 had PFAS detected (29.4% detection rate).
What types of water sources supply Lake County? ▼
Water systems in Lake County use GW (37 systems), SW (13 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. 6.9% of Lake 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.