AIRNow - San Jose, CA Air Quality - AQI: Unhealthy for Sensitive Groups (101 - 150) Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air. Two clean air centers opened this weekend in San Jose to provide relief from poor air quality blanketing the region due to wildfire smoke, city officials said Saturday. The map is based on the Air Quality Index (AQI) that "tells you how clean or polluted your air is, and what associated health effects might be a concern for you." Current and forecast air quality data for San Jose, California Useful to citizen scientists or air quality professionals alike, PurpleAir sensors are easy to install, requiring only a power outlet and WiFi. SAN FRANCISCO (CBS SF) — There is plenty of confusion when it comes to Air Quality Index readings during this time of smoke-filled skies from the historic outbreak of wildfires. A low cost air quality sensor network providing real time measurement of air quality on a public map.