PlainWater
Counties → Wisconsin

Grant County, Wisconsin

Water Systems
89
Population Served
41,605
Total Violations
3,251
766 health-based
PFAS Detected
0
of 3 tested

Violation Analysis

88.8%
Systems with Violations
36.5
Avg Violations per System
23.6%
Health-Based Violations

Water Source Types

GW
50 systems (56%)

PFAS Contamination

3
Systems Tested
0
PFAS Detected
0.0%
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

Grant Wisconsin water systems by violation status, EPA SDWIS records.

No violations on record (3) One or more violations (47)

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
Platteville Waterworks 12,268 111 Clean
Lancaster Waterworks 3,868 43 Clean
Boscobel Waterworks 3,237 21 -
Fennimore Waterworks 2,507 43 -
Cuba City Waterworks 2,141 31 -
Muscoda Waterworks 1,453 123 -
Hazel Green Waterworks 1,193 52 -
Dickeyville Waterworks 1,069 100 -
WI DOT Rest Area 106 Jamestown 880 60 -
Cassville Waterworks 777 13 -
Montfort Waterworks 718 43 -
Potosi Waterworks 718 83 -
Bloomington Waterworks 682 23 Clean
Livingston Waterworks 664 119 -
WI DNR Wyalusing Central Pump House 600 25 -
Kieler SD No 1 560 19 -
Blue River Waterworks 424 35 -
Boulder Creek Campground 368 31 -
Tennyson Waterworks 367 103 -
Bagley Waterworks 353 43 -
WI Historical Stonefield Barn 303 12 -
WI Historical Stonefield Ag Museum 300 24 -
WI DNR Wyalusing Visitors Station 254 33 -
River of Lakes Riverfront Campground & Resort 250 8 -
Platteville Golf & Cntry Clb 215 21 -
Sinsinawa Dominicans Inc 213 73 -
Hickory Grove Country Club 210 67 -
Crossroads Supper Club 208 6 -
Mount Hope Waterworks 181 37 -
Boscobel Bowling & Banquet 162 0 -
Patch Grove Waterworks 160 72 -
Birchwood Golf Course Clubhouse 160 4 -
Country Heights Supper Club 153 5 -
Stitzer Sanitary Dist 1 150 28 -
St Marys Catholic Church 150 5 -
Whitetail Bluff Camp and Resort Expansion 150 4 -
Wisconsin Badger Camp 140 0 -
Three Mile House 135 21 -
Village Bar 129 31 -
WI DNR Nelson Dewey Walnut Grove Group Camp 125 14 -
Coconut Cove Resort 108 12 -
Gulers Corners 106 14 -
I Dont Care Pub & Grub 106 32 -
Whitetail Bluff Camp and Resort 103 6 -
Calvary Baptist Ch 101 16 -
Motor Boatn Bar and Grill 101 88 -
Maryville SD 2 100 45 -
St Joseph Catholic School 100 295 -
WI DNR Nelson Dewey Maple Grove Office 100 9 -
Grant River Recreation Area 100 0 -

Other Counties in Wisconsin

Milwaukee County
85 systems · 953,104 served · 2,602 violations
Dane County
301 systems · 517,785 served · 7,065 violations
Waukesha County
590 systems · 322,690 served · 24,998 violations
Brown County
149 systems · 246,872 served · 2,891 violations
Outagamie County
107 systems · 179,535 served · 1,999 violations
Racine County
195 systems · 179,476 served · 10,597 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Grant County? ▼
Grant County has 3,251 total drinking water violations across 89 water systems, of which 766 are health-based violations. 88.8% of systems have at least one violation.
How many people get water from Grant County systems? ▼
Water systems in Grant County serve approximately 41,605 people through 89 public water systems.
Has PFAS been detected in Grant County water? ▼
Of 3 water systems tested for PFAS in Grant County, 0 had PFAS detected (0.0% detection rate).
What types of water sources supply Grant County? ▼
Water systems in Grant County use GW (50 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. 23.6% of Grant 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.