Air Quality Alert: San Jose Residents Face Unhealthy Levels for Sensitive Groups

Current Air Quality

In San Jose, CA, air quality observations for February 17, 2026, indicate that fine particulate matter (PM2.5) is the primary pollutant of concern. The PM2.5 reading reached an Air Quality Index (AQI) of 125, which is categorized as “Unhealthy for Sensitive Groups.” During the same period, Ozone (O3) levels were measured at an AQI of 31, which falls within the “Good” category.

What This Means

An AQI level between 101 and 150 is classified by the EPA as Unhealthy for Sensitive Groups. At this level, members of sensitive groups may experience health effects, though the general public is less likely to be affected.

Who Should Take Precautions

Groups at increased risk from PM2.5 exposure include people with heart or lung disease, older adults, children, and teenagers. These individuals should be mindful of their outdoor activities while these conditions persist.

What You Should Do

Members of sensitive groups are advised to reduce prolonged or heavy exertion outdoors. It is recommended to take more breaks and engage in less intense activities. Watch for symptoms such as coughing or shortness of breath as indicators to reduce activity levels.

Source

Data provided by EPA AirNow.