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Worst Air Quality ZIP Codes in Maine

Top 50 worst air quality zip codes in america in Maine. ZIP-level data from EPA Air Quality Index.

Top 50

#	ZIP Code	City / Suburb	Median AQI
1	04003	—	37
2	04009	Bridgton	37
3	04011	Brunswick	37
4	04015	Casco	37
5	04017	—	37
6	04019	Portland	37
7	04021	Cumberland Center	37
8	04024	—	37
9	04029	—	37
10	04032	Freeport	37
11	04038	Gorham	37
12	04039	Gray	37
13	04040	—	37
14	04050	—	37
15	04055	Naples	37
16	04057	Bridgton	37
17	04062	North Windham	37
18	04066	—	37
19	04069	—	37
20	04071	—	37
21	04074	Oak Hill	37
22	04079	—	37
23	04084	Standish	37
24	04085	Steep Falls	37
25	04091	—	37
26	04092	Westbrook	37
27	04096	Yarmouth	37
28	04097	—	37
29	04101	Portland	37
30	04102	Portland	37
31	04103	Portland	37
32	04105	Falmouth	37
33	04106	South Portland	37
34	04107	South Portland	37
35	04108	Portland	37
36	04109	Portland	37
37	04110	—	37
38	04260	—	37
39	04408	—	37
40	04416	Bucksport	37
41	04421	Castine	37
42	04429	—	37
43	04431	—	37
44	04472	—	37
45	04476	—	37
46	04605	Ellsworth	37
47	04607	—	37
48	04609	Bar Harbor	37
49	04612	—	37
50	04613	—	37

Methodology

This ranking is based on EPA Air Quality Index data, scoped to Maine 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

Other states

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