County profile · EPA SDWIS + UCMR5
Lafayette County, Wisconsin
40 SDWIS-listed public water systems serve 11,118 people in Lafayette County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 40
- SDWIS water systems Larger third of counties
- 1,291
- Total violations Middle third of counties
- 82.5%
- SDWIS systems w/ a violation Lower third of counties
- 0.0%
- UCMR5 PFAS rate (1 tested) Lower third of counties with tests
SDWIS compliance plate
Sheet WI065 · Lafayette County 40 sys · 1,291 viol · #2267/3254
VIOL-SEVERE · HEALTH-MID · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL
- VIOL-SEVERE 82.5% flagged
- HEALTH-MID 27.0% health
- RANK-LOWER #2267/3254
- PHOTO-FINISH ±0.1 pp
- PFAS-CLEAN 0.0% detect
- SRC-GW GW lead 100%
- SYS-MID 40 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Racine County (+ 0.1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Lafayette County ranks #2,267 of 3,254 counties by people served, and #60 of 71 counties in Wisconsin. See methodology · corpus placement.
Lafayette County standing, lower-flagged corpus third
Flagged-system rate 82.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 27.0% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #2,267 of 3,254 · #60 of 71 in Wisconsin.
Flagged-rate neighbourhood around Lafayette County
Lowest/highest poles plus in-state counties nearest Lafayette County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
Compare beyond Wisconsin
Lower-flagged peers for Lafayette County
Cross-state counties nearest Lafayette County on flagged-system share (82.5%) and cumulative violation count (1,291). 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.