PlainWater
Counties → Montana

Gallatin County, Montana

Water Systems
207
Population Served
147,444
Total Violations
30,683
1,675 health-based
PFAS Detected
1
of 5 tested

Violation Analysis

91.3%
Systems with Violations
148.2
Avg Violations per System
5.5%
Health-Based Violations

Water Source Types

GW
47 systems (23%)
SW
3 systems (1%)

PFAS Contamination

5
Systems Tested
1
PFAS Detected
20.0%
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

Gallatin Montana 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
Bozeman City Of 56,000 17 Clean
Montana State University Bozeman 19,200 0 Clean
Belgrade City Of 10,460 285 Clean
West Yellowstone Town Of 9,899 203 Clean
North Star Zoot Water 4,323 16 -
River Rock County Water and Sewer Dist 4,200 176 Clean
Rae Water and Sewer Dist 313 2,220 158 -
Gallatin Speedway 2,100 51 -
Three Forks City Of 1,900 162 -
Manhattan Town Of 1,800 224 -
Blue Basket Market Bozeman 1,508 72 -
Bridger Bowl Base 1,507 46 -
Deer Park Chalet 1,500 32 -
Grace Bible Church 1,350 27 -
Big Sky Conoco Travel Shoppe 1,000 67 -
Valley Grove Subdivision 825 148 -
Thriftway Super Stop #8 Bozeman 817 290 -
Caseys Corner 9 759 131 -
Landmark Subdivision 750 17 -
Town Pump Belgrade 4 730 129 -
West Gate KOA Cg 722 32 -
Elk Grove Water 672 16 -
Genesis Business Park 670 185 -
Caseys Corner Store No 6 510 87 -
Covered Wagon Mb Hm Park 500 37 -
Baxter Creek No 2 HOA 450 288 -
Manhattan Christian Schools 400 464 -
Wylie Creek Estates Subdivision 400 10 -
Yellowstone Commercial Center 400 4 -
Gallatin Gateway Inn 375 76 -
Corner Store Bozeman 373 82 -
Firelight Meadows LLC 350 184 -
Riverside Water and Sewer Dist 344 237 -
Stacey's Bar/the Westerner 315 85 -
Best Burger Drive IN 310 68 -
Bozeman Hot Springs Campground & RV Park 302 80 -
Mountain Meadows Estates LLP 300 172 -
X Overland Ranch 288 49 -
Thorpe Commercial Center North 288 4 -
Quality Inn 282 191 -
Murdochs Ranch Supply Bozeman 280 625 -
Big Sky School District No 72 275 1,042 -
Kountry Korner Cafe 274 142 -
Heritage Christian School 272 457 -
Amsterdam Village Lots 11 & 12 HOA 268 0 -
Korner Klub 264 372 -
Thorpe Commercial Center South 264 0 -
Forest Park Tr CT No 1 Bozeman 260 288 -
Lexley Acres Mobile Home Park 250 274 -
Kenyon Noble Lumber Company 240 104 -

Other Counties in Montana

Yellowstone County
116 systems · 168,956 served · 16,006 violations
Missoula County
243 systems · 138,758 served · 31,553 violations
Flathead County
324 systems · 105,538 served · 20,270 violations
Cascade County
98 systems · 96,521 served · 15,613 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 Gallatin County? ▼
Gallatin County has 30,683 total drinking water violations across 207 water systems, of which 1,675 are health-based violations. 91.3% of systems have at least one violation.
How many people get water from Gallatin County systems? ▼
Water systems in Gallatin County serve approximately 147,444 people through 207 public water systems.
Has PFAS been detected in Gallatin County water? ▼
Of 5 water systems tested for PFAS in Gallatin County, 1 had PFAS detected (20.0% detection rate).
What types of water sources supply Gallatin County? ▼
Water systems in Gallatin County use GW (47 systems), SW (3 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. 5.5% of Gallatin 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.