County profile · EPA SDWIS + UCMR5
Mellette County, South Dakota
1 SDWIS-listed public water systems serve 533 people in Mellette County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 1
- SDWIS water systems Smaller third of counties
- 58
- Total violations Lower third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- -
- UCMR5 PFAS (none tested) No UCMR5 tests
SDWIS compliance plate
Sheet SD095 · Mellette County 1 sys · 58 viol · #3209/3254
VIOL-SEVERE · HEALTH-MID · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-SW · SYS-TINY · BOOK-MOST
- VIOL-SEVERE 100.0% flagged
- HEALTH-MID 22.4% health
- RANK-BOTTOM #3209/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-NONE No UCMR5 set
- SRC-SW SW lead 100%
- SYS-TINY 1 systems
- BOOK-MOST 6/7 fields
Nearest flagged-rate peer: Brown County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Mellette County ranks #3,209 of 3,254 counties by people served, and #61 of 65 counties in South Dakota. See methodology · corpus placement.
Mellette 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 22.4% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Mellette County . Population served ranks #3,209 of 3,254 · #61 of 65 in South Dakota.
Flagged-rate neighbourhood around Mellette County
Lowest/highest poles plus in-state counties nearest Mellette County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| White River | 533 | 58 | - |
Compare beyond South Dakota
Mid-flagged peers for Mellette County
Cross-state counties nearest Mellette County on flagged-system share (100.0%) and cumulative violation count (58). In-state neighbours stay on the compliance plate above.
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.