Sioux County, Iowa
SDWIS compliance plate
Sheet IA167 · Sioux County 16 sys · 698 viol · #1146/3254
VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 93.8% flagged
- HEALTH-MID 22.6% health
- RANK-UPPER #1146/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 81%
- SYS-SMALL 16 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Butler County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Sioux County ranks #1,146 of 3,254 counties by people served, and #17 of 99 counties in Iowa. See methodology · corpus placement.
Sioux County standing, mid-flagged corpus third
Flagged-system rate 93.8% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 22.6% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,146 of 3,254 · #17 of 99 in Iowa.
Flagged-rate neighbourhood around Sioux County
Lowest/highest poles plus in-state counties nearest Sioux County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Sioux Center Municipal Water Department | 8,231 | 21 | Clean |
| Orange City Municipal Water Department | 6,267 | 25 | Clean |
| Southern Sioux County Rural Water | 5,420 | 37 | Clean |
| Rock Valley Water Supply | 4,059 | 97 | Clean |
| Rural Water System #1 | 3,428 | 69 | Clean |
| Hawarden Water Supply | 2,700 | 173 | - |
| Hull Water Supply | 2,384 | 9 | - |
| Rock Valley Rural Water District | 2,230 | 64 | - |
| Alton Municipal Water Department | 1,248 | 62 | - |
| Hospers Municipal Water Dept | 718 | 29 | - |
| Boyden Municipal Water Supply | 701 | 24 | - |
| Ireton Water Supply | 590 | 20 | - |
| Granville Water Supply | 310 | 21 | - |
| Maurice Municipal Water Supply | 265 | 32 | - |
| Matlock Water Supply | 74 | 15 | - |
| Lewis and Clark Regional Water System | 25 | 0 | - |
Compare beyond Iowa
Mid-flagged peers for Sioux County
Cross-state counties nearest Sioux County on flagged-system share (93.8%) and cumulative violation count (698). 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.