Bad Air Days in Grant County, Oklahoma

Not enough data

EPA monitors in Grant County ran on too few days between 2016 and 2025 to give a fair yearly count (about 27% 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 worst days on file

The worst recent year was 2025, with 1 bad day on 102 monitored days.

Date	AQI	Main pollutant
2025-03-14	105	PM2.5
2025-03-26	94	PM2.5
2023-09-06	89	PM2.5
2024-08-01	86	PM2.5
2024-02-27	77	PM2.5

The air on a normal day

Across 692 monitored days from 2019 to 2025, the air in Grant County rated Good on 84% of them, more often than the 72% typical of monitored counties, and Moderate on 16%. The median day sat at AQI 30; one day in ten went above 53.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%692 days

Grant County by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	102	84	17	1	31	105
2024	111	92	19	0	32	86
2023	120	94	26	0	32	89
2022	119	102	17	0	28	73
2021	107	90	17	0	30	66
2020	106	94	12	0	26	69
2019	27	27	0	0	22	43

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

Oklahoma 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.