• Contact/Additional Information

    (559) 230-6000

  • RAAN

    The Real-time Air Advisory Network (RAAN) is tool to protect the health of the residents of the San Joaquin Valley. It provides hourly air quality information for your local neighborhood and allows you to take action, when necessary, to avoid poor air quality.

  • Pm 2.5

    Official EPA measurement of pollution, PM 2.5 is particulate matter with a diameter of 2.5 micrometers or less. Smaller than a human hair and not visible to the eye it can be found in wood smoke.

  • Ozone

    Official EPA measurement of pollution, ozone is a gas comprised of three oxygen atoms, formed through the interaction between NOx, VOC, and sunlight. Often a result of vehicles and other mobile source of pollution.

  • Hourly PM 2.5 Concentration (µg/m³)

    Amount of PM2.5 measured by a monitor during a 1-hour time period.

  • Hourly Ozone Concentration (ppb)

    Amount of ozone measured by a monitor during a 1-hour time period.

  • µg/m³

    Micrograms per cubic meter.

  • ppb

    Parts per billion.

  • The San Joaquin Valley Air Pollution Control District makes every effort to ensure that the air quality information you receive through the Real-time Air Advisory Network is accurate and timely. However, there may be instances when the information is delayed, incorrect or missing. If you experience air quality impacts, such as wildfire smoke, in your neighborhood that are not reflected on the website, please assume that the system is not registering the incident and take appropriate action. Please contact the District at 559-230-6000 to report any abnormality you experience with the system.

Sign-up for the Real-Time Air Advisory Network Notifications
Add Location(s)
 Limit of 10 locations per registration
Your Location(s)
User Information
Email will be used to verify new user account and for RAAN communications.
Password must contain:
  • Minimum of 8 characters
  • Use numbers and letters
  • Do not use spaces
Notification Options



 Initial Notification Level


  For separate  delivery, you may receive multiple notifications throughout the hour if more than one of your locations reaches your chosen alert level.

  For group  delivery, you will receive just ONE hourly notification, approximately 30 minutes past the hour with current alerts for any of your locations that reached your chosen alert level.

Notification Disclaimer

You may not always receive an alert for your saved location, due to:

  • A location has not reached the alert level you selected
  • Data is unavailable due to a technical issue
  • Data is delayed and doesn't make the 30 minute deadline (group delivery only)

RAAN data relies on a network of monitors managed by the Valley Air District as well as monitors managed by the California Air Resources Board for which Valley Air has no control.

Terms and Conditions

Please download and view the documentation and training materials about the Real-Time Air Advisory Network.