Pennington County, South Dakota
SDWIS compliance plate
Sheet SD103 · Pennington County 157 sys · 11,864 viol · #443/3254
VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-LARGE · BOOK-FULL
- VIOL-SEVERE 91.7% flagged
- HEALTH-LOW 16.0% health
- RANK-TOP #443/3254
- PHOTO-FINISH ±0.1 pp
- PFAS-HIGH 50.0% detect
- SRC-GW GW lead 97%
- SYS-LARGE 157 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Brookings County ( -0.1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Pennington County ranks #443 of 3,254 counties by people served, and #2 of 65 counties in South Dakota. See methodology · corpus placement.
Pennington County standing, lower-flagged corpus third
Flagged-system rate 91.7% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 16.0% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #443 of 3,254 · #2 of 65 in South Dakota.
Flagged-rate neighbourhood around Pennington County
Lowest/highest poles plus in-state counties nearest Pennington County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond South Dakota
Lower-flagged peers for Pennington County
Cross-state counties nearest Pennington County on flagged-system share (91.7%) and cumulative violation count (11,864). 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.