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Counties → Wisconsin

Clark County, Wisconsin

SDWIS compliance plate

Sheet WI019 · Clark County 95 sys · 2,458 viol · #2078/3254

VIOL-SEVERE · HEALTH-LOW · RANK-LOWER · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-MID · BOOK-MOST

  • VIOL-SEVERE 66.3% flagged
  • HEALTH-LOW 18.7% health
  • RANK-LOWER #2078/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-NONE No UCMR5 set
  • SRC-GW GW lead 99%
  • SYS-MID 95 systems
  • BOOK-MOST 6/7 fields

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

According to EPA SDWIS county population served used on /counties, Clark County ranks #2,078 of 3,254 counties by people served, and #54 of 71 counties in Wisconsin. See methodology · corpus placement.

Clark County standing, lower-flagged corpus third

Flagged-system rate 66.3% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 18.7% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Clark County . Population served ranks #2,078 of 3,254 · #54 of 71 in Wisconsin.

Flagged-rate neighbourhood around Clark County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Clark · this county Juneau · near Milwaukee · highest 52.1% 65.8% 66.3% 66.3% 66.7% 66.7% 95.3%

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

Water Systems

System Name Population Violations PFAS
Neillsville Waterworks 2,384 18 -
Thorp Waterworks 1,636 361 -
Loyal Waterworks 1,308 39 -
Greenwood Waterworks 1,079 22 -
Owen Waterworks 936 4 -
Dorchester Waterworks 834 4 -
Clark Co Health Care Center 510 136 -
Withee Waterworks 506 97 -
Grassland Dairy Prod Inc 400 17 -
Granton Waterworks 349 93 -
Curtiss Waterworks 346 105 -
Clark Co Russell Mem Park 1 200 0 -
Clark Co Bruce Mound - Ski Area 150 0 -
Thorp Equipment Inc 150 2 -
Owen Mennonite Church & School 145 73 -
Thorp Mennonite Church & School 138 347 -
Grassland Dairy Prod Inc - Office 110 26 -
Lynn Dairy Inc 100 42 -
Clark Co Mead Lake Pk N Camp 100 4 -
Christ Ev Lutheran Church 100 11 -
Clark Co Snyder Park Cmpgd 100 0 -
Munson Bridge Winery 78 24 -
Pine Island Estates 75 236 -
Premier Livestock Auction/Souper Sandwich 70 0 -
Mr Eds II 60 8 -
Zion American Lutheran Church 60 25 -
Clark Co Sherwood Park 1 50 5 -
RWS Place 50 35 -
Clark Co Rock Dam Park Campground 1 50 0 -
Clark Co Russell Mem Park Showerhouse 3 50 5 -
Riviera The 45 0 -
Spencer Amish Church 45 0 -
Grandview Mobile Home Court 42 62 -
Cals Rock Dam Resort 40 4 -
Little Club 40 27 -
Hog Cabin Bar B Que 40 7 -
Hungry Frog 40 16 -
Riviera Cabins 40 4 -
Railside School 40 0 -
Dairiconcepts Chili 37 131 -
Lake Arbutus Tiki Bar & Campground 37 25 -
King and Queens Bar & Grill 35 30 -
Sander and Amys Silver Dollar 35 41 -
Outdoor Adventures 33 4 -
Outdoor Adventures - Shower Building 33 4 -
Village Acres Mobile Home CT LLC 32 21 -
Frick Inn Bar and Grill The 32 10 -
Buck N Doe Bar and Grill The 32 44 -
Humbird The 32 5 -
Bookers Northern Escape 32 0 -

Compare beyond Wisconsin

Lower-flagged peers for Clark County

Cross-state counties nearest Clark County on flagged-system share (66.3%) and cumulative violation count (2,458). 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.