The Valley Air District operates a system of air monitoring stations throughout the Valley which analyze air quality data on an hourly basis. Please click on any of the monitors below to view the current real-time air quality information in your area. To fully understand the information provided at the links below, be sure to read the Real-Time Air Advisory Network Instructions and Documentation. Some monitors provide both particulate matter (PM) data and ozone data, while other monitors only provide data as indicated. Please be aware that specific locations have not been given due to security reasons.

San Joaquin County

• Manteca (PM only)
• Stockton
• Tracy

Stanislaus County

• Modesto
• Turlock

Merced County

• Merced

Madera

• City of Madera
• South Madera County (Ozone only)

Mariposa

• Jerseydale (Ozone only)

Fresno

• Clovis
• Southeast Fresno (Ozone only)
• Central Fresno
• North Fresno (Ozone only)
• Huron (PM only)
• Parlier (Ozone only)
• Tranquillity

Kings

• Corcoran (PM only)
• Hanford

Tulare

• Ash Mountain
• Lower Kaweah (Ozone only)
• Porterville
• Visalia-Church

Kern

• Arvin (Ozone only)
• Central Bakersfield
• South Bakersfield (Ozone only)
• Edison (Ozone only)
• Lebec (PM only)
• Maricopa (Ozone only)
• Oildale (Ozone only)
• Shafter (Ozone only)