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Worst Air Quality ZIP Codes in Connecticut
Top 50 worst air quality zip codes in america in Connecticut. ZIP-level data from EPA Air Quality Index.
Top 50
| # | ZIP Code | City / Suburb | Median AQI |
|---|---|---|---|
| 1 | 06468 | Stepney | 42 |
| 2 | 06470 | Newtown | 42 |
| 3 | 06482 | Sandy Hook | 42 |
| 4 | 06484 | Shelton | 42 |
| 5 | 06604 | Bridgeport | 42 |
| 6 | 06605 | Bridgeport | 42 |
| 7 | 06606 | Bridgeport | 42 |
| 8 | 06607 | Bridgeport | 42 |
| 9 | 06608 | Bridgeport | 42 |
| 10 | 06610 | Bridgeport | 42 |
| 11 | 06611 | Trumbull Center | 42 |
| 12 | 06612 | Plattsville | 42 |
| 13 | 06614 | Oronoque | 42 |
| 14 | 06615 | Lordship | 42 |
| 15 | 06784 | Lakeside Woods | 42 |
| 16 | 06801 | Bethel | 42 |
| 17 | 06804 | Brookfield Center | 42 |
| 18 | 06807 | Cos Cob | 42 |
| 19 | 06810 | Danbury | 42 |
| 20 | 06811 | Danbury | 42 |
| 21 | 06812 | Ball Pond | 42 |
| 22 | 06820 | Tokeneke | 42 |
| 23 | 06824 | Murray | 42 |
| 24 | 06825 | Plattsville | 42 |
| 25 | 06830 | Greenwich | 42 |
| 26 | 06831 | Stamford | 42 |
| 27 | 06840 | New Canaan | 42 |
| 28 | 06850 | Norwalk | 42 |
| 29 | 06851 | Norwalk | 42 |
| 30 | 06853 | Norwalk | 42 |
| 31 | 06854 | Norwalk | 42 |
| 32 | 06855 | Norwalk | 42 |
| 33 | 06870 | Old Greenwich | 42 |
| 34 | 06877 | Ridgefield | 42 |
| 35 | 06878 | Riverside | 42 |
| 36 | 06880 | Staples | 42 |
| 37 | 06883 | Weston | 42 |
| 38 | 06890 | Southport | 42 |
| 39 | 06896 | Redding Center | 42 |
| 40 | 06897 | Georgetown | 42 |
| 41 | 06901 | Stamford | 42 |
| 42 | 06902 | Stamford | 42 |
| 43 | 06903 | Stamford | 42 |
| 44 | 06905 | Stamford | 42 |
| 45 | 06906 | Stamford | 42 |
| 46 | 06907 | Stamford | 42 |
| 47 | 06401 | Ansonia | 41 |
| 48 | 06403 | — | 41 |
| 49 | 06405 | Branford Center | 41 |
| 50 | 06410 | Cheshire Village | 41 |
Methodology
This ranking is based on EPA Air Quality Index data, scoped to Connecticut 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.