County profile · EPA SDWIS + UCMR5
Hamilton County, Illinois
4 SDWIS-listed public water systems serve 7,864 people in Hamilton County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 4
- SDWIS water systems Smaller third of counties
- 127
- Total violations Lower third of counties
- 100.0%
- SDWIS systems w/ a violation Middle third of counties
- 100.0%
- UCMR5 PFAS rate (1 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet IL065 · Hamilton County 4 sys · 127 viol · #2535/3254
VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-HIGH · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 100.0% flagged
- HEALTH-LOW 1.6% health
- RANK-LOWER #2535/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 100.0% detect
- SRC-SW SW lead 75%
- SYS-TINY 4 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, Hamilton County ranks #2,535 of 3,254 counties by people served, and #90 of 102 counties in Illinois. See methodology · corpus placement.
Hamilton 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 1.6% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 100.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #2,535 of 3,254 · #90 of 102 in Illinois.
Flagged-rate neighbourhood around Hamilton County
Lowest/highest poles plus in-state counties nearest Hamilton County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Hamilton County Water District | 3,958 | 19 | Detected |
| McLeansboro | 2,812 | 50 | - |
| Dahlgren | 859 | 11 | - |
| Broughton Water District | 235 | 47 | - |
Compare beyond Illinois
Mid-flagged peers for Hamilton County
Cross-state counties nearest Hamilton County on flagged-system share (100.0%) and cumulative violation count (127). 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.