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Counties → Wisconsin

Walworth County, Wisconsin

SDWIS compliance plate

Sheet WI127 · Walworth County 252 sys · 10,507 viol · #600/3254

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

  • VIOL-SEVERE 77.8% flagged
  • HEALTH-LOW 18.2% health
  • RANK-TOP #600/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-MID 25.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 252 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Walworth County ranks #600 of 3,254 counties by people served, and #14 of 71 counties in Wisconsin. See methodology · corpus placement.

Walworth County standing, lower-flagged corpus third

Flagged-system rate 77.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 18.2% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #600 of 3,254 · #14 of 71 in Wisconsin.

Flagged-rate neighbourhood around Walworth County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Wood · near Dodge · near Milwaukee · highest 52.1% 77.5% 77.7% 77.8% 77.8% 78.2% 95.3%

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

Water Systems

System Name Population Violations PFAS
Whitewater Waterworks 14,000 135 Clean
Elkhorn Waterworks 10,317 291 Clean
Delavan Waterworks 8,451 88 Clean
Lake Geneva Utility Commission 7,107 182 Detected
East Troy Waterworks 5,054 91 Detected
Bloomfield, Village Of 4,071 171 Clean
Lake Como Sanitary Dist 1 3,038 97 -
Genoa City Waterworks 2,766 248 -
Williams Bay Waterworks 2,601 135 -
Walworth Waterworks 2,304 69 -
Geneva National Community Services 2,250 115 -
Fontana Water Utility 1,839 252 -
Darien Waterworks 1,573 153 -
Sharon Waterworks 1,549 327 -
WI DOT Rest Area 36 Lafayette 800 9 -
WI DOT Rest Area 35 Lafayette 800 1 -
Timber Lee Chris Ctr Redwood Commons 720 0 -
Calvary Community Church Original Bldg 1972 620 9 -
Birds Eye Foods 610 118 Clean
Emagine Geneva Lakes 592 1 -
Alpine Valley Resort 550 480 -
Mt Zion Christian Church 509 434 Clean
Linn Presbyterian Church 504 31 -
Country Estates Sanitary District Town of Lyons 1 500 380 -
Interlaken Resort and Village 500 63 -
Rosewood Dinner Theater 500 4 -
Lake Lawn Resort 3 Main Well 405 60 -
Pioneer Estates of Delavan 400 416 -
Camp Juniper Knoll 400 19 -
Delavan Club Condos 395 145 -
The Chapel Whitewater 325 0 -
Chapel on the Hill Church 303 19 -
Timber Lee Chris Ctr Blue Spruce 302 11 -
Camp Edwards YMCA Micklewright Lodge 300 0 -
Camp Edwards YMCA Kybo Well 300 11 -
Camp Edwards YMCA Runge Bldg 300 0 -
Camp Edwards YMCA Hoffer Lodge 300 4 -
Westshire Farms at the Lakes 300 8 -
Boxed and Burlap 300 8 -
Camp Edwards YMCA Cooper Rec Center 300 9 -
Camp Edwards YMCA Welcome Center 300 7 -
Faith Christian School 275 27 -
Dancing Horses Stage Barn 265 0 -
Dancing Horses Game Room 265 0 -
Tibbets Elementary School 248 24 -
Nippersink Country Club & Lodge 215 8 -
Camp Alice Chester Cedar Point 8 200 31 -
Camp Alice Chester Main Camp Well 3 200 7 -
Wandawega Country Club 200 25 -
Kountry Inn & Lockharts Service 200 2 -

Compare beyond Wisconsin

Lower-flagged peers for Walworth County

Cross-state counties nearest Walworth County on flagged-system share (77.8%) and cumulative violation count (10,507). 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.