Bad Air Days in Randall County, Texas: 2 a Year
2 bad air days a year
About the middle of monitored US counties. Ranked 452 of 996 monitored counties, where 1 is worst.
What makes them bad: mostly ozone: summer smog (0% particle days).
The bad-air season here
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Most bad days here fall in July and August and May and June. Averaged over 2016 to 2025.
What actually helps here
- 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 record for Randall
In 2000 to 2009 this county averaged 0 bad days a year; in 2016 to 2025, 2. It has got worse. The worst recent year was 2018, with 9 bad days on 362 monitored days.
| Date | AQI | Main pollutant |
|---|---|---|
| 2022-05-27 | 122 | Ozone |
| 2021-07-24 | 119 | Ozone |
| 2016-04-24 | 112 | Ozone |
| 2018-08-01 | 112 | Ozone |
| 2019-07-27 | 112 | Ozone |
The air on a normal day
Across 3,560 monitored days from 2016 to 2025, the air in Randall County rated Good on 79% of them, more often than the 72% typical of monitored counties, and Moderate on 21%. The median day sat at AQI 42; one day in ten went above 65.
The pollutant setting the AQI on an ordinary day here:
- ozone100%3,560 days
Randall County by year
| Year | Days monitored | Good | Moderate | Over 100 | Over 150 | Median AQI | Highest AQI |
|---|---|---|---|---|---|---|---|
| 2025* | 360 | 298 | 62 | 0 | 0 | 41 | 97 |
| 2024 | 360 | 283 | 75 | 2 | 0 | 43 | 108 |
| 2023 | 363 | 270 | 92 | 1 | 0 | 44 | 112 |
| 2022 | 338 | 251 | 83 | 4 | 0 | 44 | 122 |
| 2021 | 360 | 293 | 64 | 3 | 0 | 42 | 119 |
| 2020 | 357 | 277 | 80 | 0 | 0 | 42 | 90 |
| 2019 | 354 | 280 | 72 | 2 | 0 | 41 | 112 |
| 2018 | 362 | 266 | 87 | 9 | 0 | 43 | 112 |
| 2017 | 360 | 281 | 78 | 1 | 0 | 43 | 105 |
| 2016 | 346 | 303 | 42 | 1 | 0 | 41 | 112 |
| 2015 | 356 | 300 | 56 | 0 | 0 | 42 | 97 |
| 2014 | 354 | 291 | 63 | 0 | 0 | 41 | 93 |
| 2013 | 355 | 269 | 84 | 2 | 0 | 43 | 122 |
| 2012 | 349 | 226 | 110 | 13 | 0 | 45 | 136 |
| 2011 | 323 | 212 | 103 | 8 | 0 | 45 | 140 |
| 2010 | 350 | 321 | 29 | 0 | 0 | 40 | 84 |
*2025 may be a partial year in EPA's file.
Elsewhere in Texas
- Harris County29/yr
- El Paso County26/yr
- Tarrant County19/yr
- Denton County17/yr
- Dallas County12/yr
- Collin County11/yr
- Bexar County11/yr
- Cameron County9/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.