PlainWater
Counties → Montana

Custer County, Montana

Water Systems
11
Population Served
10,579
Total Violations
431
60 health-based
PFAS Detected
1
of 1 tested

Violation Analysis

100.0%
Systems with Violations
39.2
Avg Violations per System
13.9%
Health-Based Violations

Water Source Types

GW
6 systems (55%)
SW
5 systems (45%)

PFAS Contamination

1
Systems Tested
1
PFAS Detected
100.0%
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

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

No violations on record (0) One or more violations (11)

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
Miles City City Of 9,565 80 Clean
Custer Co Water and Sewer Dist 480 10 -
Pine Hills Youth Correct Facil 193 24 -
Kinsey School District 63 86 125 -
Big Sky Camp and RV Park 56 7 -
Palisades Apartments 50 52 -
Kircher School Dist 03 45 17 -
Motel Miles 29 42 -
June's Bungalow 25 24 -
Albertsons Miles City No 2039 25 19 -
Primo Refill Wal-Mart No 2608 25 31 -

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
Cascade County
98 systems · 96,521 served · 15,613 violations
Lewis and Clark County
162 systems · 67,948 served · 24,270 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Custer County? ▼
Custer County has 431 total drinking water violations across 11 water systems, of which 60 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Custer County systems? ▼
Water systems in Custer County serve approximately 10,579 people through 11 public water systems.
Has PFAS been detected in Custer County water? ▼
Of 1 water systems tested for PFAS in Custer County, 1 had PFAS detected (100.0% detection rate).
What types of water sources supply Custer County? ▼
Water systems in Custer County use GW (6 systems), SW (5 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. 13.9% of Custer 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.