Grant County, South Dakota
SDWIS compliance plate
Sheet SD051 · Grant County 5 sys · 827 viol · #2431/3254
VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 2.2% health
- RANK-LOWER #2431/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-TINY 5 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Brown County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Grant County ranks #2,431 of 3,254 counties by people served, and #23 of 65 counties in South Dakota. See methodology · corpus placement.
Grant 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 2.2% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #2,431 of 3,254 · #23 of 65 in South Dakota.
Flagged-rate neighbourhood around Grant County
Lowest/highest poles plus in-state counties nearest Grant County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Grant-Roberts Rural Water System | 5,050 | 10 | Clean |
| Milbank | 3,544 | 6 | - |
| Big Stone City | 412 | 126 | - |
| Sunrise Colony | 94 | 1 | - |
| Marvin | 19 | 684 | - |
Compare beyond South Dakota
Mid-flagged peers for Grant County
Cross-state counties nearest Grant County on flagged-system share (100.0%) and cumulative violation count (827). 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. 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.