Columbia Street Waterfront District residents and politicians are demanding the immediate shutdown of a city-owned concrete ...

Another popular set of readings come from sensors developed by the Utah company PurpleAir. They are both less powerful and less accurate than the government gear but are more affordable ...

This is done by placing PurpleAir Particulate Matter sensors in schools, as well as in libraries and community centers. It’s called the Be Air Smart project, a joint partnership with the city of ...