Calhoun County, Illinois
SDWIS compliance plate
Sheet IL013 · Calhoun County 7 sys · 347 viol · #2663/3254
VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 10.4% health
- RANK-BOTTOM #2663/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-TINY 7 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Washington County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Calhoun County ranks #2,663 of 3,254 counties by people served, and #92 of 102 counties in Illinois. See methodology · corpus placement.
Calhoun 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 10.4% 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 #2,663 of 3,254 · #92 of 102 in Illinois.
Flagged-rate neighbourhood around Calhoun County
Lowest/highest poles plus in-state counties nearest Calhoun County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Calhoun County RWD | 4,675 | 30 | Clean |
| IL American-Hardin | 839 | 82 | - |
| Kampsville | 335 | 32 | - |
| Batchtown | 290 | 68 | - |
| Brussels | 245 | 126 | - |
| Alton Woodriver Sportsmans Clb | 25 | 5 | - |
| Hagen Family Orchard | 25 | 4 | - |
Compare beyond Illinois
Mid-flagged peers for Calhoun County
Cross-state counties nearest Calhoun County on flagged-system share (100.0%) and cumulative violation count (347). 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.