Thanks https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca shows a clear increase during the

Thanks https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca https://www.epa.gov/radnet/radnet-air-data-san-francisco-ca shows a clear increase during the fires. Note that graph is log10 scale. Now, can someone explain what this data means, and how dangerous these levels are?