San Jose: https://www.epa.gov/radnet/radnet-air-data-san-jose-ca https://www.epa.gov/radnet/radnet-air-data-san-jose-ca San Francisco: https://www.epa.gov/radn

San Jose: https://www.epa.gov/radnet/radnet-air-data-san-jose-ca https://www.epa.gov/radnet/radnet-air-data-san-jose-ca San Francisco: https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca Gamma Gross Count Rate represents how many gamma rays the monitor detects each minute. The levels looks normal to me.