Air Quality Category Tables
Processed on 2024-03-04 14:07:22 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 air quality monitors in Utah spent in each AQI category during the the month of January.
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.
January in Utah
January 2014 – 2 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 42 | 20 | 0 | 0 | 0 | 0 | 0 |
| New | 31 | 31 | 0 | 0 | 0 | 0 | 0 |
January 2015 – 0 monitors in AirFire data archive
January 2016 – 15 permanent monitors
January 2017 – 6 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 140 | 37 | 7 | 0 | 0 | 0 | 2 |
| New | 124 | 52 | 8 | 0 | 0 | 0 | 2 |
January 2018 – 25 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 157 | 34 | 3 | 0 | 0 | 0 | 23 |
| New | 142 | 49 | 3 | 0 | 0 | 0 | 23 |
January 2019 – 12 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 249 | 77 | 2 | 0 | 0 | 0 | 13 |
| New | 201 | 125 | 2 | 0 | 0 | 0 | 13 |
January 2020 – 23 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 323 | 44 | 0 | 0 | 0 | 0 | 5 |
| New | 296 | 71 | 0 | 0 | 0 | 0 | 5 |
January 2021 – 17 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 251 | 92 | 0 | 0 | 0 | 0 | 29 |
| New | 215 | 128 | 0 | 0 | 0 | 0 | 29 |
January 2022 – 19 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 318 | 151 | 7 | 0 | 0 | 0 | 20 |
| New | 267 | 201 | 8 | 0 | 0 | 0 | 20 |
January 2023 – 22 permanent monitors
| Good | Moderate | USG | Unhealthy | Very Unhealthy | Hazardous | Missing | |
|---|---|---|---|---|---|---|---|
| Old | 506 | 76 | 1 | 0 | 0 | 0 | 6 |
| New | 457 | 125 | 1 | 0 | 0 | 0 | 6 |
