Union County, South Dakota
SDWIS compliance plate
Sheet SD127 · Union County 8 sys · 604 viol · #2075/3254
VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-TINY · BOOK-MOST
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 2.6% health
- RANK-LOWER #2075/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-NONE No UCMR5 set
- SRC-GW GW lead 88%
- SYS-TINY 8 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, Union County ranks #2,075 of 3,254 counties by people served, and #16 of 65 counties in South Dakota. See methodology · corpus placement.
Union 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 2.6% is health-based share at or below the lower third (≤ 10.3%) . No UCMR5 tests in this extract for Union County . Population served ranks #2,075 of 3,254 · #16 of 65 in South Dakota.
Flagged-rate neighbourhood around Union County
Lowest/highest poles plus in-state counties nearest Union County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Dakota Dunes Cid | 3,700 | 3 | - |
| North Sioux City | 3,042 | 69 | - |
| Beresford | 2,359 | 2 | - |
| Elk Point | 2,124 | 87 | - |
| Clay RWS/South Union | 1,447 | 331 | - |
| Alcester | 820 | 30 | - |
| Jefferson | 475 | 79 | - |
| Two Rivers Golf Club | 120 | 3 | - |
Compare beyond South Dakota
Mid-flagged peers for Union County
Cross-state counties nearest Union County on flagged-system share (100.0%) and cumulative violation count (604). 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.