Cities with the Cleanest Air in Pennsylvania.

Cities in Pennsylvania with the most good AQI days per year.

74 cities ranked · See the national list

#	City	Population	Good AQI Days	Median AQI	Unhealthy Days
1	St. Marys	12,529	344 days/yr	36	0 days/yr
2	Levittown	50,926	312 days/yr	36	0 days/yr
3	Murrysville	20,817	283 days/yr	39	0 days/yr
4	Greensburg	14,741	283 days/yr	39	0 days/yr
5	New Kensington	12,011	283 days/yr	39	0 days/yr
6	Lower Burrell	11,633	283 days/yr	39	0 days/yr
7	Williamsport	27,612	282 days/yr	40	0 days/yr
8	Erie	93,850	280 days/yr	34	0 days/yr
9	Altoona	43,196	279 days/yr	40	0 days/yr
10	Indiana	14,212	273 days/yr	39	0 days/yr
11	Johnstown	18,087	272 days/yr	41	0 days/yr
12	State College	41,050	271 days/yr	41	0 days/yr
13	Scranton	76,033	270 days/yr	39	0 days/yr
14	Dunmore	14,181	270 days/yr	39	0 days/yr
15	Norristown	35,893	268 days/yr	41	0 days/yr
16	King of Prussia	25,857	268 days/yr	41	0 days/yr
17	Pottstown	23,476	268 days/yr	41	0 days/yr
18	Lansdale	19,011	268 days/yr	41	0 days/yr
19	Horsham	16,005	268 days/yr	41	0 days/yr
20	Willow Grove	14,131	268 days/yr	41	0 days/yr
21	Ardmore	13,909	268 days/yr	41	0 days/yr
22	Montgomeryville	13,388	268 days/yr	41	0 days/yr
23	Roslyn	10,639	268 days/yr	41	0 days/yr
24	Hermitage	16,041	265 days/yr	42	0 days/yr
25	Sharon	12,936	265 days/yr	42	0 days/yr
26	Bethlehem	77,956	263 days/yr	38	0 days/yr
27	Easton	29,739	263 days/yr	38	0 days/yr
28	Northampton	10,400	263 days/yr	38	0 days/yr
29	Carlisle	21,852	261 days/yr	35	0 days/yr
30	Allentown	125,976	260 days/yr	41	0 days/yr
31	Fullerton	16,724	260 days/yr	41	0 days/yr
32	Emmaus	11,889	260 days/yr	41	0 days/yr
33	West Chester	20,666	259 days/yr	43	1 days/yr
34	Phoenixville	19,452	259 days/yr	43	1 days/yr
35	Coatesville	13,353	259 days/yr	43	1 days/yr
36	Reading	95,242	249 days/yr	43	0 days/yr
37	Wyomissing	11,172	249 days/yr	43	0 days/yr
38	Washington	13,368	247 days/yr	44	0 days/yr
39	Chester	33,619	238 days/yr	44	1 days/yr
40	Drexel Hill	30,451	238 days/yr	44	1 days/yr
41	Yeadon	12,181	238 days/yr	44	1 days/yr
42	Lansdowne	11,122	238 days/yr	44	1 days/yr
43	Darby	10,687	238 days/yr	44	1 days/yr
44	Broomall	10,679	238 days/yr	44	1 days/yr
45	Woodlyn	9,736	238 days/yr	44	1 days/yr
46	Lebanon	26,536	235 days/yr	42	0 days/yr
47	Harrisburg	50,287	228 days/yr	44	0 days/yr
48	Colonial Park	18,032	228 days/yr	44	0 days/yr
49	Hershey	14,242	228 days/yr	44	0 days/yr
50	Progress	11,017	228 days/yr	44	0 days/yr
51	Lancaster	57,719	221 days/yr	45	0 days/yr
52	Ephrata	13,772	221 days/yr	45	0 days/yr
53	Elizabethtown	11,925	221 days/yr	45	0 days/yr
54	Columbia	10,278	221 days/yr	45	0 days/yr
55	Willow Street	9,647	221 days/yr	45	0 days/yr
56	York	44,938	217 days/yr	45	0 days/yr
57	Hanover	16,584	217 days/yr	45	0 days/yr
58	Weigelstown	15,485	217 days/yr	45	0 days/yr
59	Shiloh	11,246	217 days/yr	45	0 days/yr
60	Philadelphia	1,579,706	184 days/yr	50	0 days/yr
61	Pittsburgh	304,759	168 days/yr	52	0 days/yr
62	Bethel Park	32,881	168 days/yr	52	0 days/yr
63	Monroeville	28,295	168 days/yr	52	0 days/yr
64	Plum	26,723	168 days/yr	52	0 days/yr
65	Allison Park	22,045	168 days/yr	52	0 days/yr
66	Baldwin	21,057	168 days/yr	52	0 days/yr
67	West Mifflin	19,190	168 days/yr	52	0 days/yr
68	McKeesport	17,380	168 days/yr	52	0 days/yr
69	Franklin Park	15,235	168 days/yr	52	0 days/yr
70	Whitehall	14,811	168 days/yr	52	0 days/yr
71	Wilkinsburg	14,027	168 days/yr	52	0 days/yr
72	Carnot-Moon	13,534	168 days/yr	52	0 days/yr
73	Jefferson Hills	12,317	168 days/yr	52	0 days/yr
74	Munhall	10,548	168 days/yr	52	0 days/yr

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