Waukesha County, Wisconsin
SDWIS compliance plate
Sheet WI133 · Waukesha County 590 sys · 24,998 viol · #219/3254
VIOL-SEVERE · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-LARGE · BOOK-FULL
- VIOL-SEVERE 77.5% flagged
- HEALTH-MID 29.4% health
- RANK-TOP #219/3254
- PHOTO-FINISH ±0.2 pp
- PFAS-MID 38.5% detect
- SRC-GW GW lead 99%
- SYS-LARGE 590 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Wood County (+ 0.2 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Waukesha County ranks #219 of 3,254 counties by people served, and #3 of 71 counties in Wisconsin. See methodology · corpus placement.
Waukesha County standing, lower-flagged corpus third
Flagged-system rate 77.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 29.4% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 38.5% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #219 of 3,254 · #3 of 71 in Wisconsin.
Flagged-rate neighbourhood around Waukesha County
Lowest/highest poles plus in-state counties nearest Waukesha County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Wisconsin
Lower-flagged peers for Waukesha County
Cross-state counties nearest Waukesha County on flagged-system share (77.5%) and cumulative violation count (24,998). 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.