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The Chronicle's analysis of thousands of low-cost sensors found surprisingly high pollution readings in one part of the Outer Sunset.
Fine particles called PM2.5 are tiny but dangerous for our health. As wildfires intensify, here's why experts are keeping an eye on this air pollutant.
There has been an explosion of the use of at-home air monitors in the Bay Area. We explore when the use of air monitors took off and where these monitors tend to be located.
The Columbia Public School Board of Education is reviewing elementary attendance areas to see whether changes are needed to address population growth in Columbia.