Macoupin County, Illinois
SDWIS compliance plate
Sheet IL117 · Macoupin County 37 sys · 3,529 viol · #1021/3254
VIOL-SEVERE · HEALTH-HIGH · RANK-UPPER · PHOTO-FINISH · PFAS-MID · SRC-SW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 81.1% flagged
- HEALTH-HIGH 51.3% health
- RANK-UPPER #1021/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-MID 33.3% detect
- SRC-SW SW lead 92%
- SYS-SMALL 37 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Livingston County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Macoupin County ranks #1,021 of 3,254 counties by people served, and #30 of 102 counties in Illinois. See methodology · corpus placement.
Macoupin County standing, lower-flagged corpus third
Flagged-system rate 81.1% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 51.3% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 33.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #1,021 of 3,254 · #30 of 102 in Illinois.
Flagged-rate neighbourhood around Macoupin County
Lowest/highest poles plus in-state counties nearest Macoupin County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Illinois
Lower-flagged peers for Macoupin County
Cross-state counties nearest Macoupin County on flagged-system share (81.1%) and cumulative violation count (3,529). 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.