Air Quality in Marion, Indiana

Q: What is the air quality in Marion, Indiana?

Based on EPA data, Marion has a median AQI of 54 (Moderate). The primary pollutant is PM2.5.

Q: Is Marion a good place to live for air quality?

Marion has a 10-year average median AQI of 56 with 134 good air quality days in 2024.

Median AQI (2024)

138

Max AQI (2024)

→ stable

10-Year Trend

PM2.5

Primary Pollutant

134

Good Days (2024)

Monitoring Stations

AQI Trend (Median)

Air Quality Days by Category

Annual Summary

Year	Median AQI	Max AQI	Good Days	Moderate Days	Unhealthy Days	Ozone Days	PM2.5 Days
2024	54	138	134	228	4	92	272
2023	60	259	84	260	21	55	310
2022	56	154	101	251	13	51	314
2021	58	114	81	278	6	31	332
2020	55	144	110	250	6	56	309
2019	58	112	78	283	4	62	303
2018	55	158	105	249	11	81	284
2017	54	122	134	227	4	82	282
2016	55	143	111	244	11	78	287
2015	56	159	129	233	3	86	277

Recent Daily AQI

Date	AQI	Category	Primary Pollutant
Dec 31, 2024	28	Good	PM2.5
Dec 30, 2024	54	Moderate	PM2.5
Dec 29, 2024	34	Good	PM2.5
Dec 28, 2024	48	Good	PM2.5
Dec 27, 2024	52	Moderate	PM2.5
Dec 26, 2024	63	Moderate	PM2.5
Dec 25, 2024	70	Moderate	PM2.5
Dec 24, 2024	78	Moderate	PM2.5
Dec 23, 2024	47	Good	PM2.5
Dec 22, 2024	55	Moderate	PM2.5
Dec 21, 2024	42	Good	PM2.5
Dec 20, 2024	56	Moderate	PM2.5
Dec 19, 2024	61	Moderate	PM2.5
Dec 18, 2024	57	Moderate	PM2.5
Dec 17, 2024	59	Moderate	PM2.5
Dec 16, 2024	29	Good	PM2.5
Dec 15, 2024	74	Moderate	PM2.5
Dec 14, 2024	57	Moderate	PM2.5
Dec 13, 2024	46	Good	PM2.5
Dec 12, 2024	51	Moderate	PM2.5
Dec 11, 2024	41	Good	PM2.5
Dec 10, 2024	62	Moderate	PM2.5
Dec 9, 2024	53	Moderate	PM2.5
Dec 8, 2024	52	Moderate	PM2.5
Dec 7, 2024	54	Moderate	PM2.5
Dec 6, 2024	37	Good	PM2.5
Dec 5, 2024	51	Moderate	PM2.5
Dec 4, 2024	59	Moderate	PM2.5
Dec 3, 2024	58	Moderate	PM2.5
Dec 2, 2024	57	Moderate	PM2.5
Dec 1, 2024	34	Good	PM2.5
Nov 30, 2024	47	Good	PM2.5
Nov 29, 2024	49	Good	PM2.5
Nov 28, 2024	56	Moderate	PM2.5
Nov 27, 2024	60	Moderate	PM2.5
Nov 26, 2024	54	Moderate	PM2.5
Nov 25, 2024	58	Moderate	PM2.5
Nov 24, 2024	60	Moderate	PM2.5
Nov 23, 2024	44	Good	PM2.5
Nov 22, 2024	26	Good	PM2.5
Nov 21, 2024	23	Good	PM2.5
Nov 20, 2024	55	Moderate	PM2.5
Nov 19, 2024	63	Moderate	PM2.5
Nov 18, 2024	68	Moderate	PM2.5
Nov 17, 2024	60	Moderate	PM2.5
Nov 16, 2024	58	Moderate	PM2.5
Nov 15, 2024	61	Moderate	PM2.5
Nov 14, 2024	47	Good	PM2.5
Nov 13, 2024	59	Moderate	PM2.5
Nov 12, 2024	39	Good	PM2.5
Nov 11, 2024	30	Good	PM2.5
Nov 10, 2024	39	Good	PM2.5
Nov 9, 2024	50	Good	PM2.5
Nov 8, 2024	67	Moderate	PM2.5
Nov 7, 2024	61	Moderate	PM2.5
Nov 6, 2024	34	Good	PM2.5
Nov 5, 2024	36	Good	PM2.5
Nov 4, 2024	44	Good	PM2.5
Nov 3, 2024	55	Moderate	PM2.5
Nov 2, 2024	69	Moderate	PM2.5
Nov 1, 2024	59	Moderate	PM2.5
Oct 31, 2024	35	Good	PM2.5
Oct 30, 2024	62	Moderate	PM2.5
Oct 29, 2024	67	Moderate	PM2.5
Oct 28, 2024	61	Moderate	PM2.5
Oct 27, 2024	59	Moderate	PM2.5
Oct 26, 2024	43	Good	PM2.5
Oct 25, 2024	51	Moderate	PM2.5
Oct 24, 2024	62	Moderate	PM2.5
Oct 23, 2024	63	Moderate	PM2.5
Oct 22, 2024	73	Moderate	PM2.5
Oct 21, 2024	91	Moderate	PM2.5
Oct 20, 2024	138	Unhealthy for Sensitive Groups	PM2.5
Oct 19, 2024	115	Unhealthy for Sensitive Groups	PM2.5
Oct 18, 2024	80	Moderate	PM2.5
Oct 17, 2024	81	Moderate	PM2.5
Oct 16, 2024	69	Moderate	PM2.5
Oct 15, 2024	26	Good	Ozone
Oct 14, 2024	28	Good	Ozone
Oct 13, 2024	57	Moderate	PM2.5
Oct 12, 2024	73	Moderate	PM2.5
Oct 11, 2024	67	Moderate	PM2.5
Oct 10, 2024	64	Moderate	PM2.5
Oct 9, 2024	81	Moderate	PM10
Oct 8, 2024	58	Moderate	PM2.5
Oct 7, 2024	43	Good	PM2.5
Oct 6, 2024	58	Moderate	PM2.5
Oct 5, 2024	74	Moderate	Ozone
Oct 4, 2024	68	Moderate	PM2.5
Oct 3, 2024	80	Moderate	PM2.5

Monitoring Stations

230 SOUTH GIRLS SCHOOL ROAD

Indianapolis (Remainder)

Est. 1991-05-06

39.7589, -86.2897

Indpls- E. Michigan St./ Thomas Gregg Sch. 15

Indianapolis (Remainder)

Est. 1998-11-19

39.7750, -86.1220

Indpls- Harding St.

Indianapolis (Remainder)

Est. 1982-01-01

39.7490, -86.1863

Indpls- W. 18th St./ Ernie Pyle School 90

Indianapolis (Remainder)

Est. 1999-01-22

39.7889, -86.2146

Indpls- Washington Park/ in parking lot next to police station

Indianapolis (Remainder)

Est. 1999-03-07

39.8108, -86.1144

Indpls- West St.

Indianapolis (Remainder)

Est. 1976-08-01

39.7450, -86.1665

Indpls.- Drover St.

Indianapolis

Est. 1984-11-01

39.7480, -86.1758

Indpls.- E. 16th St.

Indianapolis (Remainder)

Est. 1990-04-02

39.7895, -86.0608

Indpls.- Ft. Harrison

Lawrence

Est. 1979-12-01

39.8589, -86.0214

Indpls.- I 70

Indianapolis (Remainder)

Est. 2014-01-01

39.7879, -86.1309

Indpls.- Illinois St.

Indianapolis

Est. 1990-02-01

39.7681, -86.1600

Indpls.- Rockville Rd.

Indianapolis (Remainder)

Est. 1984-01-01

39.7609, -86.2972

Indpls.- Southport/ United Water Services

Indianapolis (Remainder)

Est. 2011-07-01

39.6646, -86.2349

Stout Field 2

Indianapolis (Remainder)

Est. 2006-10-01

39.7404, -86.2259

Frequently Asked Questions

What is the air quality in Marion, Indiana?

Based on EPA data from 2024, Marion has a median Air Quality Index (AQI) of 54, which is classified as "Moderate." The primary pollutant is PM2.5. Over the past 10 years, air quality has been stable.

Is Marion a good place to live for air quality?

Marion has a 10-year average median AQI of 56. In 2024, there were 134 days with "Good" air quality and 4 days with unhealthy conditions. Unusually sensitive individuals should consider reducing prolonged outdoor exertion.

What pollutants affect Marion the most?

The primary pollutant driving the AQI in Marion is PM2.5. This is monitored by 14 active EPA stations in the county. Other pollutants tracked include ozone, PM10, nitrogen dioxide, sulfur dioxide, and carbon monoxide.

How many air quality monitoring stations are in Marion?

There are 14 active EPA monitoring stations in Marion, Indiana. These stations continuously measure pollutant levels and contribute to the daily AQI calculations.