County profile · EPA SDWIS + UCMR5
Custer County, Montana
11 SDWIS-listed public water systems serve 10,579 people in Custer County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 11
- SDWIS water systems Smaller third of counties
- 431
- Total violations Lower third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- 0.0%
- UCMR5 PFAS rate (1 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet MT017 · Custer County 11 sys · 431 viol · #2305/3254
VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 13.9% health
- RANK-LOWER #2305/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 55%
- SYS-SMALL 11 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Silver Bow County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Custer County ranks #2,305 of 3,254 counties by people served, and #17 of 56 counties in Montana. See methodology · corpus placement.
Custer County standing, mid-flagged corpus third
Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 13.9% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #2,305 of 3,254 · #17 of 56 in Montana.
Flagged-rate neighbourhood around Custer County
Lowest/highest poles plus in-state counties nearest Custer County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
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 | - |
Compare beyond Montana
Mid-flagged peers for Custer County
Cross-state counties nearest Custer County on flagged-system share (100.0%) and cumulative violation count (431). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.