Out of 271 ZIP codes with data in Wisconsin, these are the highest-ranked areas for gas risk score. See also: National ZIP Codes with Worst CO & Gas Safety Risk | All Wisconsin Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 271 |
| Highest value | 21/100 |
| Median value | 2/100 |
| State | Wisconsin |
Top 100 Worst ZIP Codes
| Rank | ZIP Code | City | State | Gas Risk Score | Safety Score |
|---|---|---|---|---|---|
| 1 | 54202 | Baileys Harbor | WI | 21/100 | — |
| 2 | 54204 | Brussels | WI | 21/100 | — |
| 3 | 54209 | Egg Harbor | WI | 21/100 | — |
| 4 | 54210 | Ellison Bay | WI | 21/100 | — |
| 5 | 54211 | Ephraim | WI | 21/100 | — |
| 6 | 54212 | Fish Creek | WI | 21/100 | — |
| 7 | 54213 | Forestville | WI | 21/100 | — |
| 8 | 54217 | Luxemburg | WI | 21/100 | — |
| 9 | 54234 | Sister Bay | WI | 21/100 | — |
| 10 | 54235 | Sturgeon Bay | WI | 21/100 | 50/100 |
| 11 | 54246 | Washington Island | WI | 21/100 | — |
| 12 | 54003 | Beldenville | WI | 7/100 | — |
| 13 | 54011 | Ellsworth | WI | 7/100 | — |
| 14 | 54014 | Hager City | WI | 7/100 | — |
| 15 | 54021 | Prescott | WI | 7/100 | — |
| 16 | 54723 | Bay City | WI | 7/100 | — |
| 17 | 54740 | Elmwood | WI | 7/100 | — |
| 18 | 54750 | Maiden Rock | WI | 7/100 | — |
| 19 | 54761 | Plum City | WI | 7/100 | — |
| 20 | 54767 | Spring Valley | WI | 7/100 | — |
| 21 | 53508 | Belleville | WI | 4/100 | — |
| 22 | 53515 | Black Earth | WI | 4/100 | — |
| 23 | 53517 | Blue Mounds | WI | 4/100 | — |
| 24 | 53521 | Brooklyn | WI | 4/100 | — |
| 25 | 53527 | Cottage Grove | WI | 4/100 | 65/100 |
| 26 | 53528 | Cross Plains | WI | 4/100 | 54/100 |
| 27 | 53529 | Dane | WI | 4/100 | — |
| 28 | 53531 | Deerfield | WI | 4/100 | — |
| 29 | 53532 | De Forest | WI | 4/100 | 60/100 |
| 30 | 53558 | Mc Farland | WI | 4/100 | 65/100 |
| 31 | 53559 | Marshall | WI | 4/100 | 63/100 |
| 32 | 53560 | Mazomanie | WI | 4/100 | — |
| 33 | 53562 | Middleton | WI | 4/100 | 52/100 |
| 34 | 53571 | Morrisonville | WI | 4/100 | — |
| 35 | 53572 | Mount Horeb | WI | 4/100 | 67/100 |
| 36 | 53575 | Oregon | WI | 4/100 | 60/100 |
| 37 | 53583 | Sauk City | WI | 4/100 | 64/100 |
| 38 | 53589 | Stoughton | WI | 4/100 | 66/100 |
| 39 | 53590 | Sun Prairie | WI | 4/100 | 62/100 |
| 40 | 53593 | Verona | WI | 4/100 | 50/100 |
| 41 | 53597 | Waunakee | WI | 4/100 | 50/100 |
| 42 | 53598 | Windsor | WI | 4/100 | 64/100 |
| 43 | 53703 | Madison | WI | 4/100 | 65/100 |
| 44 | 53704 | Madison | WI | 4/100 | 62/100 |
| 45 | 53705 | Madison | WI | 4/100 | 50/100 |
| 46 | 53706 | Madison | WI | 4/100 | 65/100 |
| 47 | 53711 | Madison | WI | 4/100 | 64/100 |
| 48 | 53713 | Madison | WI | 4/100 | 64/100 |
| 49 | 53714 | Madison | WI | 4/100 | 63/100 |
| 50 | 53715 | Madison | WI | 4/100 | 65/100 |
| 51 | 53716 | Madison | WI | 4/100 | 65/100 |
| 52 | 53717 | Madison | WI | 4/100 | 52/100 |
| 53 | 53718 | Madison | WI | 4/100 | 60/100 |
| 54 | 53719 | Madison | WI | 4/100 | 61/100 |
| 55 | 53726 | Madison | WI | 4/100 | 65/100 |
| 56 | 53005 | Brookfield | WI | 2/100 | 64/100 |
| 57 | 53007 | Butler | WI | 2/100 | — |
| 58 | 53017 | Colgate | WI | 2/100 | — |
| 59 | 53018 | Delafield | WI | 2/100 | — |
| 60 | 53029 | Hartland | WI | 2/100 | 33/100 |
| 61 | 53045 | Brookfield | WI | 2/100 | 61/100 |
| 62 | 53046 | Lannon | WI | 2/100 | — |
| 63 | 53051 | Menomonee Falls | WI | 2/100 | 62/100 |
| 64 | 53058 | Nashotah | WI | 2/100 | — |
| 65 | 53066 | Oconomowoc | WI | 2/100 | 60/100 |
| 66 | 53069 | Okauchee | WI | 2/100 | — |
| 67 | 53072 | Pewaukee | WI | 2/100 | 33/100 |
| 68 | 53089 | Sussex | WI | 2/100 | 50/100 |
| 69 | 53103 | Big Bend | WI | 2/100 | — |
| 70 | 53110 | Cudahy | WI | 2/100 | 83/100 |
| 71 | 53118 | Dousman | WI | 2/100 | — |
Methodology
Gas risk rankings use PHMSA gas distribution incident data (2004-2026), mapped to counties and ZIP codes. Risk scores (0-100) factor in total incidents, fatalities, and recency. Counties with more incidents, deaths, and recent events score highest. Data source: U.S. DOT Pipeline and Hazardous Materials Safety Administration.
Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-10-15.
Frequently Asked Questions
What is a gas distribution incident?
Gas distribution incidents involve failures in the local natural gas pipeline network — the pipes that carry gas from main lines to homes and businesses. These can cause explosions, fires, carbon monoxide poisoning, and property damage. PHMSA tracks all reported incidents nationally.
How can I protect my home from CO and gas leaks?
Install CO detectors on every level of your home (CPSC recommendation). Have gas appliances inspected annually by a licensed technician. Know the signs of a gas leak: rotten egg smell, hissing near gas lines, dead vegetation near pipelines. If you smell gas, leave immediately and call 911.
Explore More Rankings
- Worst ZIP Codes for Lead in Water in Wisconsin
- ZIP Codes with Most EPA Violations in Wisconsin
- Lowest Home Safety Scores in Wisconsin
- Highest Home Safety Scores in Wisconsin
- Historical NFIP Claim Counts in Wisconsin
- ZIP Codes with Highest Energy Costs in Wisconsin
- EPA Radon Zone 1 ZIP Codes in Wisconsin
- ZIP Codes with PFAS Detections in Wisconsin
- Least Reliable Water Systems in Wisconsin
- Environmental Justice Concern Areas in Wisconsin
- Worst ZIP Codes for Homebuyers in Wisconsin
- Safest ZIP Codes for Gas & CO Risk in Wisconsin
- ZIP Codes with Worst Wildfire Smoke Risk in Wisconsin
- Safest ZIP Codes for Wildfire Smoke in Wisconsin
- All Rankings