Bad Air Days in Nowata County, Oklahoma: 3 a Year
3 bad air days a year
About the middle of monitored US counties. Ranked 361 of 996 monitored counties, where 1 is worst.
What makes them bad: mostly ozone: summer smog (33% particle days).
Which months to watch
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Most bad days here fall in July and March and June 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.
The worst days on file
The worst recent year was 2022, with 7 bad days on 349 monitored days.
| Date | AQI | Main pollutant |
|---|---|---|
| 2023-09-07 | 140 | PM2.5 |
| 2022-03-04 | 139 | PM2.5 |
| 2022-07-19 | 133 | Ozone |
| 2023-09-06 | 123 | PM2.5 |
| 2022-07-20 | 122 | Ozone |
An ordinary day in Nowata
Across 1,404 monitored days from 2018 to 2023, the air in Nowata County rated Good on 47% of them, less often than the 72% typical of monitored counties, and Moderate on 52%. The median day sat at AQI 51; one day in ten went above 70.
The pollutant setting the AQI on an ordinary day here:
- fine particles (PM2.5)64%898 days
- ozone36%506 days
Every recent year on file
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2023 | 336 | 132 | 200 | 4 | 0 | 54 | 140 |
| 2022 | 349 | 111 | 231 | 7 | 0 | 56 | 139 |
| 2019 | 365 | 228 | 136 | 1 | 0 | 45 | 118 |
| 2018 | 354 | 186 | 168 | 0 | 0 | 48 | 97 |
Elsewhere in Oklahoma
- Love County10/yr
- Tulsa County6/yr
- Oklahoma County6/yr
- Jefferson County5/yr
- McClain County5/yr
- Ottawa County4/yr
- Carter County4/yr
- Washington County4/yr
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, and on why a purifier does not touch ozone in smoke vs ozone.