DeKalb County, Illinois
SDWIS compliance plate
Sheet IL037 · DeKalb County 57 sys · 2,730 viol · #573/3254
VIOL-SEVERE · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 84.2% flagged
- HEALTH-MID 28.3% health
- RANK-TOP #573/3254
- PHOTO-FINISH ±0.2 pp
- PFAS-LOW 16.7% detect
- SRC-GW GW lead 100%
- SYS-MID 57 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: McHenry County (+ 0.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, DeKalb County ranks #573 of 3,254 counties by people served, and #18 of 102 counties in Illinois. See methodology · corpus placement.
DeKalb County standing, lower-flagged corpus third
Flagged-system rate 84.2% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 28.3% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 16.7% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #573 of 3,254 · #18 of 102 in Illinois.
Flagged-rate neighbourhood around DeKalb County
Lowest/highest poles plus in-state counties nearest DeKalb County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Illinois
Lower-flagged peers for DeKalb County
Cross-state counties nearest DeKalb County on flagged-system share (84.2%) and cumulative violation count (2,730). 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.