County profile · EPA SDWIS + UCMR5
Henry County, Illinois
77 SDWIS-listed public water systems serve 43,864 people in Henry County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 77
- SDWIS water systems Larger third of counties
- 5,798
- Total violations Upper third of counties
- 81.8%
- SDWIS systems w/ a violation Lower third of counties
- 50.0%
- UCMR5 PFAS rate (2 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet IL073 · Henry County 77 sys · 5,798 viol · #1045/3254
VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 81.8% flagged
- HEALTH-MID 33.7% health
- RANK-UPPER #1045/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 50.0% detect
- SRC-GW GW lead 100%
- SYS-MID 77 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Randolph County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Henry County ranks #1,045 of 3,254 counties by people served, and #31 of 102 counties in Illinois. See methodology · corpus placement.
Henry County standing, lower-flagged corpus third
Flagged-system rate 81.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 33.7% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,045 of 3,254 · #31 of 102 in Illinois.
Flagged-rate neighbourhood around Henry County
Lowest/highest poles plus in-state counties nearest Henry County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Illinois
Lower-flagged peers for Henry County
Cross-state counties nearest Henry County on flagged-system share (81.8%) and cumulative violation count (5,798). 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.