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AirHistory

Air Quality in Indiana

10-year air quality trends for 36 monitored areas in Indiana.

See full Indiana air quality rankings →
36
Cities
41
Avg AQI (5yr)
30
Improving
3
Stable
3
Worsening

All Monitored Areas in Indiana

Floyd, Indiana

Floyd County · AQI 36 (5yr avg) · Improving · Ozone

A

Jackson, Indiana

Jackson County · AQI 35 (5yr avg) · Improving · Ozone

A

Morgan, Indiana

Morgan County · AQI 35 (5yr avg) · Improving · Ozone

A

Allen, Indiana

Allen County · AQI 42 (5yr avg) · Improving · PM2.5

B

Carroll, Indiana

Carroll County · AQI 34 (5yr avg) · Improving · Ozone

B

Posey, Indiana

Posey County · AQI 34 (5yr avg) · Improving · Ozone

B

Boone, Indiana

Boone County · AQI 35 (5yr avg) · Improving · Ozone

B

Huntington, Indiana

Huntington County · AQI 31 (5yr avg) · Improving · Ozone

B

Perry, Indiana

Perry County · AQI 36 (5yr avg) · Improving · Ozone

B

Warrick, Indiana

Warrick County · AQI 36 (5yr avg) · Improving · Ozone

B

Shelby, Indiana

Shelby County · AQI 35 (5yr avg) · Improving · Ozone

B

Brown, Indiana

Brown County · AQI 35 (5yr avg) · Improving · Ozone

B

Elkhart, Indiana

Elkhart County · AQI 43 (5yr avg) · Improving · PM2.5

B

Hendricks, Indiana

Hendricks County · AQI 34 (5yr avg) · Improving · Ozone

B

Howard, Indiana

Howard County · AQI 44 (5yr avg) · Improving · PM2.5

B

LaPorte, Indiana

LaPorte County · AQI 37 (5yr avg) · Improving · Ozone

B

Delaware, Indiana

Delaware County · AQI 37 (5yr avg) · Stable · Ozone

B

Dubois, Indiana

Dubois County · AQI 43 (5yr avg) · Improving · PM2.5

B

Greene, Indiana

Greene County · AQI 39 (5yr avg) · Improving · Ozone

B

Spencer, Indiana

Spencer County · AQI 42 (5yr avg) · Improving · PM2.5

B

Henry, Indiana

Henry County · AQI 38 (5yr avg) · Improving · PM2.5

B

Tippecanoe, Indiana

Tippecanoe County · AQI 43 (5yr avg) · Improving · PM2.5

B

Wabash, Indiana

Wabash County · AQI 36 (5yr avg) · Stable · Ozone

B

Bartholomew, Indiana

Bartholomew County · AQI 43 (5yr avg) · Improving · PM2.5

B

Hamilton, Indiana

Hamilton County · AQI 45 (5yr avg) · Improving · PM2.5

C

Knox, Indiana

Knox County · AQI 36 (5yr avg) · Worsening · Ozone

C

Monroe, Indiana

Monroe County · AQI 41 (5yr avg) · Stable · PM2.5

C

Vigo, Indiana

Vigo County · AQI 49 (5yr avg) · Improving · PM2.5

C

Madison, Indiana

Madison County · AQI 46 (5yr avg) · Stable · PM2.5

C

Vanderburgh, Indiana

Vanderburgh County · AQI 49 (5yr avg) · Stable · PM2.5

C

Whitley, Indiana

Whitley County · AQI 47 (5yr avg) · Stable · PM2.5

C

Porter, Indiana

Porter County · AQI 46 (5yr avg) · Improving · PM2.5

C

St. Joseph, Indiana

St. Joseph County · AQI 50 (5yr avg) · Stable · PM2.5

C

Clark, Indiana

Clark County · AQI 50 (5yr avg) · Stable · PM2.5

C

Lake, Indiana

Lake County · AQI 53 (5yr avg) · Stable · PM2.5

C

Marion, Indiana

Marion County · AQI 57 (5yr avg) · Stable · PM2.5

C
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Frequently Asked Questions

Indiana has 36 monitored areas with an average 5-year AQI of 41 and an average Air Quality Grade of B. 30 cities are improving, 3 are worsening, and 3 are stable.

Floyd, Indiana has the best Air Quality Grade (A) in Indiana with a 5-year average AQI of 36.

Of 36 monitored areas in Indiana, 30 are showing improving trends, 3 are worsening, and 3 remain stable over the past decade.

Sources: EPA Air Quality System (AQS)
Last updated: