County profile · EPA SDWIS + UCMR5
Warren County, Illinois
16 SDWIS-listed public water systems serve 13,214 people in Warren County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 16
- SDWIS water systems Middle third of counties
- 1,488
- Total violations Middle third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- 0.0%
- UCMR5 PFAS rate (1 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet IL187 · Warren County 16 sys · 1,488 viol · #2128/3254
VIOL-SEVERE · HEALTH-HIGH · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-HIGH 51.0% health
- RANK-LOWER #2128/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-SMALL 16 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, Warren County ranks #2,128 of 3,254 counties by people served, and #71 of 102 counties in Illinois. See methodology · corpus placement.
Warren 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 51.0% 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 #2,128 of 3,254 · #71 of 102 in Illinois.
Flagged-rate neighbourhood around Warren County
Lowest/highest poles plus in-state counties nearest Warren County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Monmouth | 8,902 | 269 | Clean |
| Roseville | 915 | 130 | - |
| Alexis | 836 | 73 | - |
| Kirkwood | 714 | 248 | - |
| United School District 304 | 480 | 111 | - |
| Little Swan Lake SD | 438 | 56 | - |
| Little York | 304 | 274 | - |
| Fairview Center Methodist Ch | 150 | 2 | - |
| Coldbrook Christian Church | 130 | 19 | - |
| Bayer US Crop Sco.monsanto Company | 120 | 87 | - |
| County Line Diner | 50 | 22 | - |
| River of Life Church | 50 | 15 | - |
| Western Illinois Nature Group | 50 | 72 | - |
| Youngs Lake | 25 | 52 | - |
| Hickory Grove Lake Company | 25 | 54 | - |
| County Market Water Vend Mach | 25 | 4 | - |
Compare beyond Illinois
Mid-flagged peers for Warren County
Cross-state counties nearest Warren County on flagged-system share (100.0%) and cumulative violation count (1,488). 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. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.