County profile · EPA SDWIS + UCMR5
Mountrail County, North Dakota
4 SDWIS-listed public water systems serve 1,436 people in Mountrail County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 4
- SDWIS water systems Smaller third of counties
- 376
- Total violations Lower third of counties
- 75.0%
- SDWIS systems w/ a violation Lower third of counties
- -
- UCMR5 PFAS (none tested) No UCMR5 tests
SDWIS compliance plate
Sheet ND061 · Mountrail County 4 sys · 376 viol · #3127/3254
VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-SW · SYS-TINY · BOOK-MOST
- VIOL-SEVERE 75.0% flagged
- HEALTH-LOW 4.8% health
- RANK-BOTTOM #3127/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-NONE No UCMR5 set
- SRC-SW SW lead 100%
- SYS-TINY 4 systems
- BOOK-MOST 6/7 fields
Nearest flagged-rate peer: Burleigh County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Mountrail County ranks #3,127 of 3,254 counties by people served, and #39 of 52 counties in North Dakota. See methodology · corpus placement.
Mountrail County standing, lower-flagged corpus third
Flagged-system rate 75.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 4.8% is health-based share at or below the lower third (≤ 10.3%) . No UCMR5 tests in this extract for Mountrail County . Population served ranks #3,127 of 3,254 · #39 of 52 in North Dakota.
Flagged-rate neighbourhood around Mountrail County
Lowest/highest poles plus in-state counties nearest Mountrail County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Stanley City Of | 1,138 | 30 | - |
| Plaza City Of | 171 | 110 | - |
| Ross City Of | 97 | 236 | - |
| North Prairie RWD System IV | 30 | 0 | - |
Compare beyond North Dakota
Lower-flagged peers for Mountrail County
Cross-state counties nearest Mountrail County on flagged-system share (75.0%) and cumulative violation count (376). 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.