Clark County, South Dakota
SDWIS compliance plate
Sheet SD025 · Clark County 7 sys · 919 viol · #2886/3254
VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-TINY · BOOK-MOST
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 15.6% health
- RANK-BOTTOM #2886/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-NONE No UCMR5 set
- SRC-GW GW lead 100%
- SYS-TINY 7 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, Clark County ranks #2,886 of 3,254 counties by people served, and #34 of 65 counties in South Dakota. See methodology · corpus placement.
Clark 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 15.6% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Clark County . Population served ranks #2,886 of 3,254 · #34 of 65 in South Dakota.
Flagged-rate neighbourhood around Clark County
Lowest/highest poles plus in-state counties nearest Clark County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Clark Rural Water System | 2,325 | 68 | - |
| Clark | 1,148 | 20 | - |
| Willow Lake | 255 | 59 | - |
| Fordham Colony | 142 | 178 | - |
| Collins Colony | 95 | 106 | - |
| Shamrock Colony | 75 | 231 | - |
| Garden City | 33 | 257 | - |
Compare beyond South Dakota
Mid-flagged peers for Clark County
Cross-state counties nearest Clark County on flagged-system share (100.0%) and cumulative violation count (919). 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.