Bad Air Days in Neosho County, Kansas: 1 a Year

1 bad air day a year

Fewer bad air days than most monitored US counties. Ranked 601 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly particles: smoke and dust (86% particle days).

Which months to watch

Most bad days here fall in March and April and August and September. 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

The worst recent year was 2023, with 3 bad days on 365 monitored days.

Date	AQI	Main pollutant
2025-03-14	315	PM10
2024-03-21	168	PM2.5
2023-03-30	161	PM2.5
2023-09-07	155	PM2.5
2025-08-01	152	PM2.5

Most days, not the worst ones

Across 3,639 monitored days from 2016 to 2025, the air in Neosho County rated Good on 65% of them, less often than the 72% typical of monitored counties, and Moderate on 35%. The median day sat at AQI 44; one day in ten went above 61.

The pollutant setting the AQI on an ordinary day here:

ozone49%1,797 days
fine particles (PM2.5)49%1,769 days
coarse dust (PM10)2%72 days

Neosho County by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	365	234	128	3	2	44	315
2024	366	247	116	3	1	44	168
2023	365	147	215	3	2	54	161
2022	360	201	159	0	0	48	94
2021	362	171	189	2	0	51	145
2020	366	235	129	2	0	44	106
2019	365	219	145	1	0	45	119
2018	359	285	74	0	0	40	87
2017	365	304	61	0	0	38	77
2016	366	321	45	0	0	37	87
2015	364	311	52	1	0	36	122
2014	331	256	74	1	0	40	116
2013	61	59	2	0	0	14	58
2012	61	60	1	0	0	19	59
2011	56	54	2	0	0	19	55
2010	61	61	0	0	0	19	47

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

Kansas 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.