Lyon County, Iowa
SDWIS compliance plate
Sheet IA119 · Lyon County 12 sys · 961 viol · #2204/3254
VIOL-SEVERE · HEALTH-MID · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-MID 33.3% health
- RANK-LOWER #2204/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-SMALL 12 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Pottawattamie County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Lyon County ranks #2,204 of 3,254 counties by people served, and #53 of 99 counties in Iowa. See methodology · corpus placement.
Lyon 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 33.3% is health-based share above the upper 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 #2,204 of 3,254 · #53 of 99 in Iowa.
Flagged-rate neighbourhood around Lyon County
Lowest/highest poles plus in-state counties nearest Lyon County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Rock Rapids Municipal Water Works | 2,611 | 18 | - |
| Lyon-Sioux RWS-Doon | 1,765 | 26 | - |
| Lyon-Sioux RWS-Big Sioux | 1,530 | 71 | Clean |
| Lyon-Sioux RWS-Rock Rapids | 1,187 | 17 | - |
| George Water Supply | 1,077 | 120 | - |
| Inwood Water Supply | 928 | 51 | - |
| Larchwood Water Supply | 926 | 72 | - |
| Doon Water Supply | 619 | 304 | - |
| Lyon-Sioux RWS-Boyden | 605 | 58 | - |
| Little Rock Water Supply | 441 | 6 | - |
| Lester Water Supply | 296 | 63 | - |
| Alvord Municipal Water Supply | 206 | 155 | - |
Compare beyond Iowa
Mid-flagged peers for Lyon County
Cross-state counties nearest Lyon County on flagged-system share (100.0%) and cumulative violation count (961). 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.