Bad Air Days in Tippecanoe County, Indiana: under 1 a Year

under 1 bad air day a year

Rare: among the cleanest-air counties EPA monitors. Ranked 771 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly particles: smoke and dust (100% particle days).

The bad-air season here

Most bad days here fall in June and July. Averaged over 2016 to 2025.

What to buy, and what not to

Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
On the odd bad day, check AirNow and keep windows shut.

Better or worse than it was

In 2000 to 2009 this county averaged 5 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2023, with 6 bad days on 349 monitored days.

Date	AQI	Main pollutant
2023-06-28	206	PM2.5
2023-06-27	194	PM2.5
2023-07-17	135	PM2.5
2023-07-16	132	PM2.5
2023-06-29	124	PM2.5

An ordinary day in Tippecanoe

Across 3,481 monitored days from 2016 to 2025, the air in Tippecanoe County rated Good on 64% of them, less often than the 72% typical of monitored counties, and Moderate on 35%. 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%3,481 days

Every recent year on file

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	347	244	103	0	0	39	95
2024	345	256	89	0	0	35	67
2023	349	237	106	6	2	42	206
2022	350	268	82	0	0	36	96
2021	349	213	136	0	0	44	97
2020	348	167	181	0	0	51	73
2019	351	210	141	0	0	43	78
2018	345	207	138	0	0	46	80
2017	350	191	159	0	0	48	83
2016	347	248	99	0	0	40	88
2015	328	161	167	0	0	51	99
2014	316	178	137	1	0	46	128
2013	363	94	269	0	0	58	99
2012	353	59	293	1	0	59	104
2011	332	95	236	1	0	57	105
2010	365	97	266	2	0	58	120

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

Nearby counties on file

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.