Bad Air Days in Sullivan County, Indiana

Not enough data

EPA monitors in Sullivan County ran on too few days between 2016 and 2025 to give a fair yearly count (about 41% of days covered). Neighbouring counties below are a better guide.

What actually helps here

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

The record for Sullivan

Date	AQI	Main pollutant
2018-02-10	92	PM2.5
2018-01-10	86	PM2.5
2019-02-02	81	PM2.5
2018-01-09	79	PM2.5
2018-02-07	79	PM2.5

Most days, not the worst ones

Across 592 monitored days from 2017 to 2020, the air in Sullivan County rated Good on 62% of them, less often than the 72% typical of monitored counties, and Moderate on 38%. The median day sat at AQI 42; one day in ten went above 59.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%592 days

Year by year

Year	Days monitored	Good	Moderate	Median AQI	Highest AQI
2020	31	23	8	39	59
2019	116	73	43	41	81
2018	181	108	73	43	92
2017	264	164	100	43	69

Indiana compared

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.