PlainWater
Counties → Montana

Cascade County, Montana

Water Systems
98
Population Served
96,521
Total Violations
15,613
1,037 health-based
PFAS Detected
2
of 4 tested

Violation Analysis

91.8%
Systems with Violations
159.3
Avg Violations per System
6.6%
Health-Based Violations

Water Source Types

GW
31 systems (32%)
SW
19 systems (19%)

PFAS Contamination

4
Systems Tested
2
PFAS Detected
50.0%
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

Cascade Montana water systems by violation status, EPA SDWIS records.

No violations on record (2) One or more violations (48)

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
Great Falls City Of 60,000 26 Clean
Malmstrom Air Force Base 8,850 82 Detected
Source Giant Springs Inc 3,007 18 -
Montana Expo Park Cascade County 2,510 25 -
Sun Prairie Village County 1,800 581 Clean
University of Providence 1,472 37 -
Black Eagle Cascade County Water Sewer 1,233 31 -
Giant Springs State Park 1,011 27 -
Prairie Water Company 1,000 91 -
Culligan Water Conditioning Great Falls 900 22 Clean
Town Pump Gore Hill 760 145 -
Cascade Town Of 650 18 -
Belt Town Of 600 169 -
Countryside Village MHP Grt Fls 600 4 -
Vaughn Cascade County Water and Sewer 585 57 -
Two Buttes Water Users Assn 525 119 -
Missouri River Bar and Grill 512 162 -
Armington Jct Belt Rest Stop 510 62 -
Gore Hill County Water Dist 500 332 -
Homestead Acres County Water and Sewer 500 55 -
Bushard Water Company 425 18 -
Mountain View Co-Op Ulm 421 56 -
Highwood Mobile Home Park 400 32 -
Sun Prairie Water District 350 94 -
Mt Air Natl Guard 120th Air Lift Wing 350 0 -
Frontier Inn 300 17 -
Centerville School 292 140 -
Great Falls KOA Kampground 287 564 -
Great Falls RV Park 274 0 -
Ryan Dam Water System 230 189 -
Neihart Town Of 229 376 -
Headquarters Building Region 4 220 18 -
Stockett Water and Sewer Dist 210 338 -
South Wind Water and Sewer District 200 356 -
Tracy Water Users Corp 200 439 -
Lds Church Sun River 200 68 -
Sand Coulee Water Users District 180 1,072 -
Simms High School 180 901 -
Grandview Trailer Court 165 4 -
Heritage Baptist Church 151 109 -
Big Stone Colony Inc 130 8 -
Pleasant Park Community Inc 125 1,791 -
Beef N Bone Steakhouse 123 33 -
Pleasant Valley Colony 120 25 -
Cascade Colony 105 16 -
Fairhaven Colony 105 47 -
First Peoples Buffalo Jump State Park 105 20 -
Tri Hil Wua Gore Hill 100 870 -
Big Bend Ranch Subdivision 100 529 -
Shade Tree Mobile Park 100 7 -

Other Counties in Montana

Yellowstone County
116 systems · 168,956 served · 16,006 violations
Gallatin County
207 systems · 147,444 served · 30,683 violations
Missoula County
243 systems · 138,758 served · 31,553 violations
Flathead County
324 systems · 105,538 served · 20,270 violations
Lewis and Clark County
162 systems · 67,948 served · 24,270 violations
Silver Bow County
23 systems · 42,630 served · 2,525 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Cascade County? ▼
Cascade County has 15,613 total drinking water violations across 98 water systems, of which 1,037 are health-based violations. 91.8% of systems have at least one violation.
How many people get water from Cascade County systems? ▼
Water systems in Cascade County serve approximately 96,521 people through 98 public water systems.
Has PFAS been detected in Cascade County water? ▼
Of 4 water systems tested for PFAS in Cascade County, 2 had PFAS detected (50.0% detection rate).
What types of water sources supply Cascade County? ▼
Water systems in Cascade County use GW (31 systems), SW (19 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. 6.6% of Cascade 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.