Air Quality Category Tables
Processed on 2024-03-07 09:38:14 PST.
Disclaimer: Data presented here come from a variety of sources and do not represent official EPA measurements. Please visit AirNow for official measurements.
Cumulative exposure to smoke is an important public health metric.
This report summarizes the cumulative number of days US air quality
monitors
spent in each AQI category each year.
The tables below include only permanent monitors measuring PM2.5 and show cumulative exposure under existing NAAQS (National Ambient Air Quality Standards) and under the 2024 revised standards for PM2.5.
In the tables and plots below, ‘Old’ designates cumulative days calculated using the 2023 PM2.5 NAAQS while ‘New’ is calculated using the 2024 revised PM2.5 NAAQS. The impact of the NAAQS revision is quite clear.
US annual
2014 – 649 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 167183 | 36572 | 882 | 178 | 4 | 1 | 30970 |
| New | 135007 | 68677 | 948 | 178 | 8 | 2 | 30970 |
2015 – 718 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 181409 | 37803 | 1304 | 530 | 41 | 12 | 40606 |
| New | 149276 | 69862 | 1368 | 481 | 95 | 17 | 40606 |
2016 – 796 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 192417 | 29166 | 1167 | 257 | 11 | 16 | 66411 |
| New | 161029 | 60482 | 1230 | 261 | 15 | 17 | 66411 |
2017 – 862 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 223203 | 42058 | 2288 | 912 | 131 | 43 | 42345 |
| New | 183954 | 81170 | 2395 | 888 | 165 | 63 | 42345 |
2018 – 931 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 218380 | 43809 | 1907 | 1342 | 130 | 25 | 72397 |
| New | 179735 | 82354 | 1986 | 1249 | 231 | 38 | 72397 |
2019 – 985 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 272749 | 39114 | 531 | 168 | 16 | 5 | 44752 |
| New | 231697 | 80132 | 563 | 166 | 18 | 7 | 44752 |
2020 – 1072 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 275021 | 38757 | 1348 | 688 | 87 | 37 | 74247 |
| New | 235236 | 78457 | 1420 | 656 | 118 | 51 | 74247 |
2021 – 1170 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 314871 | 59857 | 2805 | 1470 | 145 | 43 | 47495 |
| New | 262364 | 112210 | 2933 | 1386 | 241 | 57 | 47495 |
2022 – 1287 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 351165 | 52975 | 1397 | 628 | 52 | 14 | 61700 |
| New | 296752 | 107299 | 1479 | 605 | 76 | 20 | 61700 |
2023 – 1421 permanent monitors in AirFire data archive
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 362341 | 70777 | 3194 | 2259 | 348 | 85 | 78241 |
| New | 302551 | 130390 | 3336 | 2053 | 554 | 120 | 78241 |
