What does this fall aqi ranking show?

It orders states by Fall air quality index. It is a comparison of this one published measure, not an overall ranking of where to live.

Where do these figures come from?

EPA AirData (2025) supplies this measure. States without a comparable published value are shown as not ranked rather than estimated.

How should I use this ranking?

Use it to narrow a search, then open a state or county profile for the underlying figures, source dates and caveats. A statewide number may not describe every neighbourhood.

Lowest fall aqi by state

Fall air quality index.

Average daily EPA Air Quality Index for September through November. Lower is cleaner; the AQI reports the day’s worst measured pollutant.

How to read this ranking

Hawaii has the lowest published fall aqi in this comparison, at 26.8. The next states shown are Maine (28.6) and Alaska (29.3).

The table orders 50 states by fall air quality index. It describes one published measure, not an overall judgment about where to live.

Use the result as a starting point, then compare the underlying source, dates, and local county figures before making a decision. Average daily EPA Air Quality Index for September through November. Lower is cleaner; the AQI reports the day’s worst measured pollutant.

1Hawaii26.8
2Maine28.6
3Alaska29.3
4Vermont30.9
5New Hampshire32.7
6Rhode Island32.7
7Montana33.1
8Massachusetts33.3
9Wyoming35.0
10South Dakota35.2
11North Dakota35.3
12Virginia35.6
13New York36.2
14Nebraska36.6
15New Jersey36.7
16Maryland36.9
17West Virginia36.9
18Minnesota37.0
19Idaho38.7
20Delaware39.1
21Wisconsin39.2
22Florida39.5
23North Carolina40.9
24South Carolina41.7
25Pennsylvania41.8
26Michigan42.6
27District of Columbia42.7
28Tennessee42.7
29Oregon42.8
30Washington43.5
31Iowa43.7
32Kansas43.8
33Alabama44.2
34Georgia44.5
35Kentucky45.1
36Louisiana45.1
37Missouri45.1
38New Mexico45.4
39Colorado45.5
40Mississippi45.6
41Indiana45.8
42Utah46.1
43Ohio48.1
44Oklahoma48.8
45Arkansas49.8
46Illinois50.3
47Nevada50.4
48Texas58.1
49Arizona59.0
50California61.3

Not ranked, because this measure is not published for them: Connecticut. EPA publishes this only for counties with nearby reporting monitors. A blank is no sufficiently complete monitoring record, not clean air.

Related health rankings

Frequently asked questions

What does this ranking show?: It orders states by Fall air quality index. It is one measure, not an overall verdict on where to live.
Where do the figures come from?: EPA AirData (2025). States without a comparable published figure are listed as not ranked rather than estimated.
How should I use it?: Use it to narrow your search, then open a state or county profile for the source date, caveats and local context.

Put this map on your own site

Free to use. The chart names its source and links back, so it stays honest wherever it ends up.

<iframe src="https://movermath.com/embed/fall-aqi" width="100%" height="420" style="border:0" loading="lazy" title="Fall air quality index by state"></iframe>

Source: EPA AirData (2025). · How this is built

Loading MoverMath…