Processed on 2024-03-04 13:53:12 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 Oregon 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 Oregon

January 2014 – 26 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 401 266 10 2 0 0 3
New 296 366 15 2 0 0 3

January 2015 – 30 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 420 255 4 0 0 0 3
New 302 373 4 0 0 0 3

January 2016 – 70 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 511 166 0 0 0 0 5
New 412 265 0 0 0 0 5

January 2017 – 32 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 439 245 11 2 0 0 16
New 322 362 11 2 0 0 16

January 2018 – 78 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 563 127 1 0 0 0 22
New 458 232 1 0 0 0 22

January 2019 – 37 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 609 220 1 0 0 0 7
New 484 345 1 0 0 0 7

January 2020 – 106 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 768 80 0 0 0 0 20
New 693 155 0 0 0 0 20

January 2021 – 67 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 1394 225 0 0 0 0 24
New 1169 449 1 0 0 0 24

January 2022 – 72 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 1552 397 2 0 0 0 64
New 1306 643 2 0 0 0 64

January 2023 – 79 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 1786 199 5 0 0 0 87
New 1610 375 5 0 0 0 87