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Counties → Wisconsin

Fond du Lac County, Wisconsin

SDWIS compliance plate

Sheet WI039 · Fond du Lac County 211 sys · 5,061 viol · #644/3254

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

  • VIOL-SEVERE 72.0% flagged
  • HEALTH-MID 23.4% health
  • RANK-TOP #644/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 211 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Fond du Lac County ranks #644 of 3,254 counties by people served, and #18 of 71 counties in Wisconsin. See methodology · corpus placement.

Fond du Lac County standing, lower-flagged corpus third

Flagged-system rate 72.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 23.4% is health-based share in the middle 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 #644 of 3,254 · #18 of 71 in Wisconsin.

Flagged-rate neighbourhood around Fond du Lac County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Fond du Lac · this county Sheboygan · near Milwaukee · highest 52.1% 71.2% 72% 72% 72.6% 72.7% 95.3%

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

Water Systems

System Name Population Violations PFAS
Fond Du Lac Waterworks 44,303 390 Clean
Ripon Water Utility 7,716 11 Clean
North Fond Du Lac Waterworks 5,014 86 Clean
Campbellsport Waterworks 1,825 93 -
Oakfield Waterworks 1,058 37 -
Ashwood Grove Edgewater 1,046 7 -
Fond Du Lac TN Water Utility 980 26 -
Brandon Waterworks 872 35 -
Laconia High School and Middle School 620 40 -
Bluemkes Bp 616 10 -
China One 517 0 -
Lakeview Mart 510 36 -
Alto Reformed Church 502 21 -
St Cloud Waterworks 494 24 -
Mount Calvary Waterworks 478 2 -
Saputo Cheese USA Inc Waupun 435 41 -
Laconia Elementary School 420 21 -
Manor Hill Mobile Home Park 400 15 -
WI DNR Kmsfnu Long Lake Pumphouse 400 12 -
Shepherd of the Hills Sch 385 120 -
Sargento Cheese Inc Baker Plant 385 4 -
Tiki Beach Resort Kml 370 0 -
Fairwater Waterworks 365 9 -
Sunset on the Water Grill & Bar 360 0 -
Scouting America Camp Long Lake Dining Hall 350 0 -
Scouting America Camp Long Lake 3 Campmasters House 350 0 -
Scouting America Camp Long Lake 2 South Shower House 325 0 -
Rosendale Mart 322 0 -
Pipe Express 307 0 -
Wendts on the Lake 304 4 -
Eden Meats and Corner Express 285 219 -
Gieses Country Market 255 13 -
Red Cabin at Green Acres 254 24 -
Eden Elementary School 253 11 -
Our Lady of the Holyland Parish St John Site 234 12 -
WI DNR Kmsfnu Long Lake S Bath House 230 1 -
Peace Lutheran Church 224 12 -
Tiki Beach Resort Cmpgd 210 4 -
Blancks Supper Club 206 9 -
Jim & Lindas Lakeview Supper Club 205 6 -
Fondy Sports Complex Inc 204 5 -
Fondy Aqua Park 204 8 -
Cedar Lodge Restaurant 203 3 -
St John Lutheran Church Hall 202 5 -
Our Risen Savior Cath Ch 202 3 -
Sun Retreats Fond Du Lac East Trading Post 201 0 -
Hamburger Haus The 201 0 -
WI DNR Kmsfnu Mauthe Lk Beach 200 4 -
Actus Nutrition Fond Du Lac 177 26 -
Webers Express 158 2 -

Compare beyond Wisconsin

Lower-flagged peers for Fond du Lac County

Cross-state counties nearest Fond du Lac County on flagged-system share (72.0%) and cumulative violation count (5,061). 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.