Bad Air Days in Cherokee County, Oklahoma: 0 a Year

0 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 977 of 996 monitored counties, where 1 is worst.

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 10 bad days a year; in 2016 to 2025, 0. The air has improved.

Date	AQI	Main pollutant
2016-06-07	77	Ozone
2016-04-05	71	Ozone
2016-09-22	71	Ozone
2017-06-06	71	Ozone
2017-05-06	67	Ozone

Most days, not the worst ones

Across 549 monitored days from 2016 to 2017, the air in Cherokee County rated Good on 93% of them, more often than the 72% typical of monitored counties, and Moderate on 7%. The median day sat at AQI 39; one day in ten went above 49.

The pollutant setting the AQI on an ordinary day here:

ozone100%549 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2017	280	261	19	0	0	39	71
2016	269	250	19	0	0	38	77
2015	278	256	22	0	0	37	93
2014	284	259	25	0	0	38	77
2013	289	245	43	1	0	40	101
2012	283	188	79	16	0	44	140
2011	292	206	69	17	0	43	143
2010	294	227	62	5	1	40	151

Elsewhere in Oklahoma

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.