The Pollution Control Agency (MPCA) says it's working to improve air quality monitoring following a state review stemming from a dispute over reported violations at a Minneapolis metal foundry.

Louisiana should prioritize its biggest polluting facilities for new real-time, fence-line air monitoring if it wants to ...

Toxics in the air from urban wildfires may include dioxins, asbestos, and lead. But testing, until recently, for these air toxics has been limited.