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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.

Related rankings

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