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Counties → Wisconsin

Iowa County, Wisconsin

SDWIS compliance plate

Sheet WI049 · Iowa County 77 sys · 2,450 viol · #1513/3254

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

  • VIOL-SEVERE 81.8% flagged
  • HEALTH-MID 24.9% health
  • RANK-MID #1513/3254
  • PHOTO-FINISH ±0.7 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-MID 77 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Lafayette County (+ 0.7 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Iowa County ranks #1,513 of 3,254 counties by people served, and #40 of 71 counties in Wisconsin. See methodology · corpus placement.

Iowa County standing, lower-flagged corpus third

Flagged-system rate 81.8% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 24.9% is health-based share above the upper 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 #1,513 of 3,254 · #40 of 71 in Wisconsin.

Flagged-rate neighbourhood around Iowa County

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

0% 20% 40% 60% 80% 100% Bayfield · lowest Iowa · this county Racine · near Milwaukee · highest 52.1% 81% 81.8% 82.5% 82.6% 82.8% 95.3%

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

Water Systems

System Name Population Violations PFAS
Dodgeville Waterworks 4,583 17 Clean
Mineral Point Waterworks 2,487 93 -
House on the Rock 2,025 69 -
Barneveld Waterworks 1,258 35 -
Arena Waterworks 877 34 Clean
Highland Waterworks 842 28 -
American Players Theatre -Gateway 821 6 -
American Players Theatre Patron 810 0 -
Iowa Grant Schools 730 22 -
Ridgeway Waterworks 690 245 -
Avoca Waterworks 637 88 -
Linden Waterworks 547 23 -
Farm & Fleet of Dodgeville 540 39 -
WI DNR Gov Dodge Cox Hollow Picnic 500 22 -
WI DNR Blue Mound Upper Well 500 30 -
House on the Rock Resort 470 85 -
Cobb Waterworks 458 137 -
WI DNR Gov Dodge Twin Valley 200 375 16 -
Tower Junction 320 11 -
House on the Rock Winter Well 315 0 -
Rewey Waterworks 290 161 -
Hollandale Waterworks 283 22 -
WI DNR Blue Mound Aquatic Center 265 0 -
WI DNR Gov Dodge Cox Hollow Open Camp 250 73 -
WI DNR Blue Mound Lower Well 250 23 -
WI DNR Blue Mound Fobm Shelter 250 13 -
WI DNR Gov Dodge Twin Valley 300 Camp 225 12 -
WI DNR Gov Dodge Group Efgh 200 14 -
WI DNR Gov Dodge Office 200 8 -
WI DNR Gov Dodge Twin Valley Picnic 200 21 -
WI DNR Gov Dodge Cox Hollow Wooded 200 15 -
Wood Violet Recovery 200 54 -
Don Q Inn Hotel 174 0 -
Frank Lloyd Wright Visitor Center & Cafe 164 4 -
Blackhawk Lake Office & Nature Center 160 11 -
HI Point Steak House 150 32 -
Blackhawk Lake Camping Area 150 12 -
American Players Theatre -Touchstone 149 0 -
Taliesin - Main Building 137 123 -
Americinn 112 31 -
Taliesin Hillside School 110 16 -
Edmund TN of Linden San Dist 1 110 63 -
WI DNR Tower Hill Park 103 14 -
Hecks Marketplace 102 11 -
Bethel Horizons Indian Rock Campground 100 0 -
Bethel Horizons Main Site 100 5 -
Blackhawk Lake Beach 100 23 -
Deer Valley Golf Course 93 0 -
Silver Star 85 24 -
Compeer Financial 84 16 -

Compare beyond Wisconsin

Lower-flagged peers for Iowa County

Cross-state counties nearest Iowa County on flagged-system share (81.8%) and cumulative violation count (2,450). 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.