Wildfires that may be impacting air quality in the San Joaquin Valley:
Air Quality in Foothill and Mountain Communities

This page displays real time data from temporary, portable monitors located in the foothills of the Sierra Nevada. The data is not collected or verified by the Valley Air District. Please refer to the District’s ROAR guidelines to make decisions about outdoor activities.

If you can smell smoke and see ash, that is an indication that you should be treating air quality conditions as RAAN Level 4 or 5 and take the following steps to limit your exposure:
  1. Limit your outdoor activities, especially children and people with chronic heart and lung diseases.
  2. Remain inside air conditioned buildings. Note: If you do not have an air conditioner, staying inside with the windows closed may be dangerous in extremely hot weather. In these cases, seek alternative shelter.
  3. If you have asthma or other lung diseases, make sure you follow your doctor’s instructions about taking your medicines and following your asthma management plan. Call your doctor if your symptoms worsen.
  4. If you are an older adult, have children, or if you have heart or lung diseases, talk with your doctor about whether you should leave the area.
Please note: Smoke is a mixture of gases and fine (microscopic) particles that can cause health problems.The RAAN monitors are designed to detect these fine particles. Ash pieces, however, are much larger in size and will not be detected. If an area is covered in ash, air quality should be considered a RAAN Level 4 or higher even if the monitor reflects a lower reading.

Effort to Reduce Fuels in Forest

With the fuel load in the Valley’s mountain areas at an all-time high due to the drought and the bark beetle infestation; the District is working collaboratively with land management agencies to conduct strategic controlled burns to lessen the wildfire risk. Learn more here.