Air Quality

Why this is important: All particles found in the air, such as dust, dirt, soot, smoke, and liquid droplets are particulate matter. Exposure to particulate matter, especially PM2.5, has been linked to causing or worsening lung (including asthma) and cardiovascular disease (heart disease and stroke). People with these diseases, adults age 65 and older, and infants and children are more likely to be affected by breathing PM 2.5, especially as levels rise.

Definition: Percent of days tested exceeding the National Ambient Air Quality Standards (NAAQS) 24-hour standard for particulate matter (PM2.5). PM2.5 consists of particles less than 2.5 micrometers in diameter. The air quality standard is 35 µg/m3.

Data Source: Air Quality System (AQS), Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency. Accessed through the Washington Tracking Network. Presentation of data by Spokane Regional Health District, Data Center.



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