San Jose Air Quality Reaches Unhealthy for Sensitive Groups Level on March 20

Current Air Quality

On March 20, 2026, the reporting area of San Jose, CA, recorded an air quality index (AQI) of 108. The primary pollutant of concern is Ozone (O3), which has reached the “Unhealthy for Sensitive Groups” category. Additionally, Fine Particulate Matter (PM2.5) was measured at an AQI of 58, which falls within the “Moderate” category.

What This Means

An AQI level of 108 is classified by the EPA as “Unhealthy for Sensitive Groups.” At this level, air quality is considered acceptable for the general public; however, members of sensitive groups may experience health effects from exposure to the air.

Who Should Take Precautions

Groups at increased risk from elevated ozone levels include:

• People with lung disease, such as asthma
• Children and teenagers
• Older adults
• People who are active outdoors, including outdoor workers

What You Should Do

To reduce exposure and potential health impacts, individuals in sensitive groups should consider reducing prolonged or heavy outdoor exertion. It is recommended to take more breaks, schedule outdoor activities for times when ozone levels are lower, and monitor for symptoms such as coughing or shortness of breath.

Source

Data provided by EPA AirNow.