Monona County, Iowa
SDWIS compliance plate
Sheet IA133 · Monona County 14 sys · 1,080 viol · #2658/3254
VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 17.7% health
- RANK-BOTTOM #2658/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-SMALL 14 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, Monona County ranks #2,658 of 3,254 counties by people served, and #84 of 99 counties in Iowa. See methodology · corpus placement.
Monona 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 17.7% 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 #2,658 of 3,254 · #84 of 99 in Iowa.
Flagged-rate neighbourhood around Monona County
Lowest/highest poles plus in-state counties nearest Monona County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Onawa Municipal Water Plant | 2,906 | 3 | Clean |
| Mapleton Municipal Water Plant | 1,124 | 129 | - |
| Whiting Water Supply | 727 | 19 | - |
| Ute Water Supply | 338 | 78 | - |
| Timber Ridge Lodge Recreation, Ltd. | 250 | 51 | - |
| Onawa KOA | 250 | 42 | - |
| Blencoe Municipal Waterworks | 224 | 82 | - |
| Moorhead Water Supply | 189 | 136 | - |
| Soldier Water Supply | 180 | 95 | - |
| Castana Municipal Water Supply | 103 | 332 | - |
| Lewis and Clark State Park | 67 | 58 | - |
| Divide Hill Bar & Grill | 50 | 35 | - |
| Peters Park | 32 | 12 | - |
| Sunset at the Oasis RV Campground | 25 | 8 | - |
Compare beyond Iowa
Mid-flagged peers for Monona County
Cross-state counties nearest Monona County on flagged-system share (100.0%) and cumulative violation count (1,080). 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.