Bad Air Days in Dubois County, Indiana

Not enough data

EPA monitors in Dubois County ran on too few days between 2016 and 2025 to give a fair yearly count (about 50% of days covered). Neighbouring counties below are a better guide.

What to buy, and what not to

EPA monitors here ran too few days to give a fair yearly count. Use AirNow for today's air.

Better or worse than it was

The worst recent year was 2023, with 1 bad day on 239 monitored days.

Date	AQI	Main pollutant
2023-07-16	130	PM2.5
2021-07-21	94	PM2.5
2018-02-10	89	PM2.5
2022-01-14	88	PM2.5
2025-01-09	88	PM2.5

An ordinary day in Dubois

Across 1,825 monitored days from 2016 to 2025, the air in Dubois County rated Good on 66% of them, less often than the 72% typical of monitored counties, and Moderate on 33%. The median day sat at AQI 41; one day in ten went above 59.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)98%1,794 days
coarse dust (PM10)2%31 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	363	253	110	0	39	88
2024	366	265	101	0	39	70
2023	239	152	86	1	44	130
2022	123	80	43	0	42	88
2021	125	77	48	0	43	94
2020	123	78	45	0	44	71
2019	120	76	44	0	43	73
2018	119	71	48	0	42	89
2017	120	83	37	0	42	72
2016	127	78	49	0	44	76
2015	122	65	57	0	47	79
2014	122	49	73	0	53	97
2013	120	49	71	0	54	78
2012	123	50	73	0	53	82
2011	119	41	77	1	56	109
2010	119	30	89	0	58	92

*2025 may be a partial year in EPA's file.

Elsewhere in Indiana

How this is counted

A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.