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Counties → Wisconsin

Washington County, Wisconsin

SDWIS compliance plate

Sheet WI131 · Washington County 268 sys · 7,862 viol · #477/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-SEVERE 75.7% flagged
  • HEALTH-LOW 16.8% health
  • RANK-TOP #477/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-HIGH 50.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 268 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Buffalo County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Washington County ranks #477 of 3,254 counties by people served, and #10 of 71 counties in Wisconsin. See methodology · corpus placement.

Washington County standing, lower-flagged corpus third

Flagged-system rate 75.7% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 16.8% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #477 of 3,254 · #10 of 71 in Wisconsin.

Flagged-rate neighbourhood around Washington County

Lowest/highest poles plus in-state counties nearest Washington County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Bayfield · lowest Washington · this county Price · near Milwaukee · highest 52.1% 75.3% 75.7% 75.7% 76% 76.6% 95.3%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
West Bend Waterworks 31,752 291 Detected
Germantown Water Utility 20,027 329 Clean
Hartford Waterworks 15,805 258 Detected
Jackson Waterworks 7,844 20 Clean
Slinger Water Utility 5,659 29 Detected
Kewaskum Waterworks 4,309 137 Detected
Cabelas - Richfield 3,931 0 Clean
Kwik Trip #1013 2,253 4 -
Fox Bros Piggly Wiggly Inc - Hubertus 1,314 15 -
Allenton Sanitary District 860 47 -
Discalced Carmelites & Holy Hill Cafe 823 12 -
Pioneer Plaza 808 1 -
The Columbian 752 7 -
Rstore #4517 720 6 -
Caseys General Store #3793 715 0 -
St Johns Lutheran School 710 767 -
Kettle Moraine Lutheran Hs 585 132 -
Amy Belle School 522 36 -
Addison Elementary School 515 6 -
Sunburst Ski Area - Maint Shop 510 6 -
Lazy Days Area C & Lower D 506 3 -
Sunburst Ski Area 500 6 -
Sunburst Snowtubing Area 500 0 -
Daniel Boone Conservation League Club House 453 8 -
St Gabriel School-Parish 438 20 -
Fox & Hounds Restaurant - Kitchen 415 4 -
Fox & Hounds Restaurant - Bar 415 12 -
Richfield Middle School 410 11 -
Casa Tequila 410 2 -
Friess Lake Elementary School 407 145 -
Erin School 405 37 -
Kenickys Public House 404 26 -
Scenic View Country Club 403 67 -
Rockfield School 375 24 -
Minikani YMCA Camp - Halquist Family Lodge 364 0 -
Shepherd of the Hills Church - New 364 0 -
Cedar Lake Home 5 330 118 -
Weasler Engineering 325 188 -
Country Mart 320 5 -
Minikani YMCA Camp - Pioneer Unit 309 7 -
Minikani YMCA Camp - Trail Blazer 309 7 -
Minikani YMCA Camp - Dining Lodge 309 7 -
Minikani YMCA Camp - Horse Barn 309 0 -
Minikani YMCA Camp - Explorer Unit 309 4 -
West Bend Lakes Golf & Recreation 307 13 -
Hartford Town Hall 305 0 -
Richfield Heritage Park and Municipal Shop 304 0 -
Richfield Heritage Park - Concession Stand 304 4 -
Camp Awana 3 Canteen Well 302 2 -
Camp Awana 2 Hilltop Well 302 2 -

Compare beyond Wisconsin

Lower-flagged peers for Washington County

Cross-state counties nearest Washington County on flagged-system share (75.7%) and cumulative violation count (7,862). 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.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

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.