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Counties → Wisconsin

Sauk County, Wisconsin

SDWIS compliance plate

Sheet WI111 · Sauk County 199 sys · 4,499 viol · #760/3254

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

  • VIOL-SEVERE 58.8% flagged
  • HEALTH-MID 20.8% health
  • RANK-UPPER #760/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-LOW 20.0% detect
  • SRC-GW GW lead 100%
  • SYS-LARGE 199 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Eau Claire County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Sauk County ranks #760 of 3,254 counties by people served, and #20 of 71 counties in Wisconsin. See methodology · corpus placement.

Sauk County standing, lower-flagged corpus third

Flagged-system rate 58.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 20.8% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 20.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #760 of 3,254 · #20 of 71 in Wisconsin.

Flagged-rate neighbourhood around Sauk County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Eau Claire · near Adams · near Milwaukee · highest 52.1% 58% 58.6% 58.8% 60% 60.2% 95.3%

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

Water Systems

System Name Population Violations PFAS
Baraboo Waterworks 12,703 366 Clean
Reedsburg Waterworks 9,984 36 Detected
Ho Chunk Casino 5,486 0 Clean
Prairie Du Sac Waterworks 4,006 55 Clean
Sauk City Waterworks 3,518 11 Clean
Lake Delton Waterworks 2,914 14 -
Spring Green Waterworks 1,626 104 -
West Baraboo Waterworks 1,414 6 -
WI DNR Devils Lake North Shore 1,115 56 -
WI DNR Devils Lake East Campground 1,102 68 -
WI DNR Devils Lake South Picnic Area 900 46 -
Plain Waterworks 792 19 -
WI DNR Devils Lake Quartzite Campground 615 0 -
North Freedom Waterworks 589 25 -
Devils Head Resort 535 109 -
WI DNR Mirror Lake Office/Shop 505 13 -
WI DNR Mirror Lake Sandstone Ridge 501 5 -
WI DNR Devils Lake Upper Ice Age Campground 500 27 -
Bluffview Sanitary District 450 32 -
Merrimac Waterworks 440 85 -
International Crane Foundation Gateway Visitors 420 0 -
St Boniface Catholic Church 400 0 -
La Valle Waterworks 365 81 -
Pioneer Park Comfort Sta 1 305 0 -
Pioneer Park Comfort Sta 2 305 0 -
Loganville Waterworks 300 41 -
Spring Green Estates 300 81 -
Rock Springs Waterworks 292 48 -
Yogi Bears Jellystone Park #1 Comfort Station 256 3 -
Yogi Bears Jellystone Park #2 Comfort Station 256 7 -
Yogi Bears Jellystone Park #3 Comfort Station 256 16 -
WI Dells KOA Campground Lower Well 255 2 -
WI Dells KOA Campground Upper Well 255 0 -
WI DNR Devils Lake South Shore Shelter 255 15 -
Ironton Waterworks 253 135 -
Chapparal RV Resort LLC 250 0 -
Christmas Mt Clubhouse 245 0 -
WI DNR Mirror Lake Cliffwood 225 12 -
Tumbled Rock Brewery & Kitchen 210 0 -
Country Bumpkin Farm Market 208 0 -
Ishnala Supper Club 205 0 -
Pioneer Park Pool 205 0 -
Pioneer Park NE Corner 205 0 -
Devils Head Resort Highrise 205 5 -
Chapparal Campground Lower Well 203 0 -
Natures Touch Campground Shower 202 0 -
Wisconsin Riverside Campground 201 21 -
Dell Pines Campground Well 1 200 0 -
River Valley Mobil 200 7 -
Sauk Co Lake Redstone County Park Beach 200 10 -

Compare beyond Wisconsin

Lower-flagged peers for Sauk County

Cross-state counties nearest Sauk County on flagged-system share (58.8%) and cumulative violation count (4,499). 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.