Wisconsin — 2nd District
119th Congress · 108 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 108 ZIP codes in Wisconsin's 2nd District: the district earns a grade C (63/100). 627 EPA violations on record, 153 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Wisconsin's 2nd District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 53943 | Loganville | 83 | B | 0 |
| 2 | 53561 | Merrimac | 82 | B | 3 (1 health) |
| 3 | 53940 | Lake Delton | 82 | B | 2 |
| 4 | 53958 | Reedsburg | 81 | B | 5 |
| 5 | 53578 | Prairie Du Sac | 79 | B | 8 (3 health) |
| 6 | 53951 | North Freedom | 78 | B | 0 |
| 7 | 53961 | Rock Springs | 78 | B | 1 |
| 8 | 53577 | Plain | 77 | B | 9 (2 health) |
| 9 | 53959 | Reedsburg | 71 | B | 5 |
| 10 | 53516 | Blanchardville | 70 | B | 0 |
| 11 | 53520 | Brodhead | 70 | B | 0 |
| 12 | 53521 | Brooklyn | 70 | B | 0 |
| 13 | 53529 | Dane | 70 | B | 1 |
| 14 | 53533 | Dodgeville | 70 | B | 1 |
| 15 | 53558 | Mc Farland | 70 | B | 0 |
| 16 | 53559 | Marshall | 70 | B | 0 |
| 17 | 53572 | Mount Horeb | 70 | B | 0 |
| 18 | 53576 | Orfordville | 70 | B | 0 |
| 19 | 53913 | Baraboo | 70 | B | 1 |
| 20 | 53502 | Albany | 69 | C | 2 |
| 21 | 53510 | Belmont | 69 | C | 3 (1 health) |
| 22 | 53517 | Blue Mounds | 69 | C | 3 |
| 23 | 53523 | Cambridge | 69 | C | 3 (1 health) |
| 24 | 53526 | Cobb | 69 | C | 4 (1 health) |
| 25 | 53527 | Cottage Grove | 69 | C | 2 (1 health) |
| 26 | 53537 | Footville | 69 | C | 1 (1 health) |
| 27 | 53566 | Monroe | 69 | C | 1 (1 health) |
| 28 | 53574 | New Glarus | 69 | C | 3 (1 health) |
| 29 | 53589 | Stoughton | 69 | C | 5 (1 health) |
| 30 | 53593 | Verona | 69 | C | 2 (1 health) |
| 31 | 53598 | Windsor | 69 | C | 0 |
| 32 | 53506 | Avoca | 68 | C | 3 (2 health) |
| 33 | 53507 | Barneveld | 67 | C | 6 (3 health) |
| 34 | 53586 | Shullsburg | 67 | C | 0 |
| 35 | 53508 | Belleville | 66 | C | 2 (1 health) |
| 36 | 53535 | Edmund | 66 | C | 0 |
| 37 | 53543 | Highland | 66 | C | 0 |
| 38 | 53553 | Linden | 66 | C | 1 |
| 39 | 53571 | Morrisonville | 66 | C | 0 |
| 40 | 53580 | Rewey | 66 | C | 1 |
| 41 | 53595 | Dodgeville | 66 | C | 1 |
| 42 | 53503 | Arena | 65 | C | 10 |
| 43 | 53522 | Browntown | 65 | C | 13 (2 health) |
| 44 | 53541 | Gratiot | 65 | C | 8 (2 health) |
| 45 | 53544 | Hollandale | 65 | C | 3 (1 health) |
| 46 | 53587 | South Wayne | 65 | C | 2 |
| 47 | 53596 | Sun Prairie | 65 | C | 3 (1 health) |
| 48 | 53504 | Argyle | 64 | C | 3 (2 health) |
| 49 | 53515 | Black Earth | 64 | C | 2 (1 health) |
| 50 | 53531 | Deerfield | 64 | C | 5 |
Overview
Wisconsin's 2nd District encompasses 108 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (63/100).
627 EPA violations have been recorded across this district's water systems. 153 are health-based violations. About 81% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Surface Water Treatment Rule - 185 violations
- Stage 2 DBP Rule - 156 violations
- Lead and Copper Rule - 109 violations
- Stage 1 DBP Rule - 60 violations
- Gross Beta - 40 violations
Housing Context
Homes in this district were built on average around 1970 (~56 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 1 ZIP code in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
Data Sources
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 108 ZIP codes in Wisconsin's 2nd District.