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Record Setting Air Quality in 2017

Air Quality Index (AQI)

  • 2017 recorded the greatest number of Good AQI days across all counties in Valley history

Ozone

  • 2017 was a record setting ozone season, with the lowest number of days exceeding the 84 ppb 8-hour ozone standard
  • 2017 set a new record low ozone design value for the Valley, bringing the region closer to attaining the 84 ppb federal 8-hour ozone standard
24 Hour Pm 2.5 Standard

PM2.5

  • Even with air quality impacts from wildfires, the year 2017 continued the decline in PM2.5 design values, where the Valley continued to attain the 65 µg/m3 federal 24-hour PM2.5 standard, and continued to make progress toward meeting the other federal PM2.5 standards
24 Hour Pm 2.5 Standard

Record Setting Air Quality in 2016 Read More

Record Setting Air Quality in 2015 Read More