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Worst Air Quality ZIP Codes in Wisconsin
Top 50 worst air quality zip codes in america in Wisconsin. ZIP-level data from EPA Air Quality Index.
Top 50
| # | ZIP Code | City / Suburb | Median AQI |
|---|---|---|---|
| 1 | 53005 | Brookfield | 43 |
| 2 | 53007 | Butler | 43 |
| 3 | 53018 | Delafield | 43 |
| 4 | 53029 | Hartland | 43 |
| 5 | 53045 | Brookfield | 43 |
| 6 | 53046 | Lannon | 43 |
| 7 | 53051 | Menomonee Falls | 43 |
| 8 | 53058 | Nashotah | 43 |
| 9 | 53066 | Summit | 43 |
| 10 | 53069 | Okauchee Lake | 43 |
| 11 | 53072 | Pewaukee | 43 |
| 12 | 53089 | Sussex | 43 |
| 13 | 53103 | Big Bend | 43 |
| 14 | 53110 | Cudahy | 43 |
| 15 | 53118 | Dousman | 43 |
| 16 | 53119 | Eagle | 43 |
| 17 | 53122 | Elm Grove | 43 |
| 18 | 53127 | — | 43 |
| 19 | 53129 | Greendale | 43 |
| 20 | 53130 | Hales Corners | 43 |
| 21 | 53132 | Franklin | 43 |
| 22 | 53146 | New Berlin | 43 |
| 23 | 53149 | Mukwonago | 43 |
| 24 | 53150 | Muskego | 43 |
| 25 | 53151 | New Berlin | 43 |
| 26 | 53153 | North Prairie | 43 |
| 27 | 53154 | Oak Creek | 43 |
| 28 | 53172 | South Milwaukee | 43 |
| 29 | 53183 | Wales | 43 |
| 30 | 53186 | Waukesha | 43 |
| 31 | 53188 | Waukesha | 43 |
| 32 | 53189 | Waukesha | 43 |
| 33 | 53202 | Milwaukee | 43 |
| 34 | 53203 | Milwaukee | 43 |
| 35 | 53204 | Milwaukee | 43 |
| 36 | 53205 | Milwaukee | 43 |
| 37 | 53206 | Milwaukee | 43 |
| 38 | 53207 | Milwaukee | 43 |
| 39 | 53208 | Milwaukee | 43 |
| 40 | 53209 | Milwaukee | 43 |
| 41 | 53210 | Milwaukee | 43 |
| 42 | 53211 | Milwaukee | 43 |
| 43 | 53212 | Milwaukee | 43 |
| 44 | 53213 | Wauwatosa | 43 |
| 45 | 53214 | West Allis | 43 |
| 46 | 53215 | Milwaukee | 43 |
| 47 | 53216 | Milwaukee | 43 |
| 48 | 53217 | River Hills | 43 |
| 49 | 53218 | Milwaukee | 43 |
| 50 | 53219 | Milwaukee | 43 |
Methodology
This ranking is based on EPA Air Quality Index data, scoped to Wisconsin ZIP codes. Up to 50 ZIP codes are listed, ordered by median aqi. Data is refreshed periodically. See our methodology page for full details on data sources and update frequency.