Action days are usually called when the AQI gets into the. Please select a city for detailed current conditions and forecasts. The higher the AQI value, the greater the level of air pollution and the.
The AQI ranges from to 500. Public comments and suggestions are encouraged. A FAQ page is available. A new report reveals troubling toxic levels in air quality. Oregon’s index is based on three pollutants regulated by the federal Clean Air Act: ground-level ozone, particle pollution and nitrogen dioxide.
Compare the current air quality in different European cities. See AQI Table for how to interpret the colors. The air quality is presented by an air quality index. The hourly index is updated every hour and allows you to see how air quality changes and evolves during the day.
O = Ozone, PM = Particles ≤ microns, PM 2. Air quality changes, for example subject to weather conditions. Forecast Discussion: As expecte PM and PM 2. Moderate AQI category yesterday. Get air quality and weather information for the Bay Area. Air Monitoring Data View current and historical air quality and weather information collected from the Air District’s air monitoring network. Disclaimer: The data used in the compilation of this page have undergone only preliminary quality assurance checks.