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Current Air Quality

Air Quality Index

Predominant Air Pollutant: Fine Particulate Matter (PM2.5)
Updated Hourly at 2021-08-02 5:35 am
Good0 – 50
Moderate51 – 100
Unhealthy for Sensitive Groups101 – 150
Unhealthy151 – 200
170
Very Unhealthy201 – 300
Hazardous301 +

Jump to Air Quality Index Definitions

Air Quality Forecast

Today
Unhealthy
Tomorrow
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Sunday, August 1st – Today will be a little cooler and cloudy as a weather system brings monsoonal moisture to the region along with a chance of showers and thunderstorms primarily in the mountains before the hot dry weather returns tomorrow. Although conditions might improve for a brief period today, on-shore winds behind the weather system will begin to bring some of the wildfire smoke (PM-2.5) currently banked against the Cascades into our area, transporting additional smoke from wildfires as surface winds shift to north and west. Smoke models suggest that the pool of smoke over the region could take several more days to disperse, with worsening conditions likely tonight into Tuesday. Depending on the winds and any additional smoke from increased wildfire activity, air quality will occasionally worsen and may reach well into the AQI-Unhealthy range or higher at various times on Sunday and Monday. /MCKAY

Learn more about Particulate Matter (PM) and Ozone (O3).

Monitoring Air Quality

The map below provides information for each monitoring site in the network. Select a specific site to access current day and five-day hourly AQI histories for the air pollutants measured at that site.
  • Locations measuring the predominant air pollutant this hour
  • Locations reporting other pollutants

About the Air Quality Index (AQI)

The AQI is an index for reporting air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. Think of the AQI as a yardstick that runs from 0 to 500. The higher the AQI value, the greater the level of air pollution and the greater the health concern.

An AQI value of 100 generally corresponds to the national air quality standard for the pollutant, which is the level EPA has set to protect public health. To make it easier to understand, the AQI is divided into six categories:

Preview Only: Edit these values wihtin the WP Admin > AQI Monitoring & Burn Status
  • GoodAir quality is considered satisfactory, and air pollution poses little or no risk.Numeric Value: 0-50

  • ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Numeric Value: 51-100

  • Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Numeric Value: 101-150

  • UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effects.Numeric Value: 151-200

  • Very UnhealthyHealth alert: everyone may experience more serious health effects.Numeric Value: 201-300

  • HazardousHealth warnings of emergency conditions. The entire population is more likely to be affected.Numeric Value: 301+

The Current Air Quality reflects the predominant air pollutant (either PM2.5, PM10, or Ozone*) with the highest reading in the monitoring network. *Ozone is only measured during ozone season, May-September.

Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the “Hazardous category.” Additional information on reducing exposure to extremely high levels of particle pollution is available.