A Times investigation finds toxic levels of lead in soil in Altadena and Pacific Palisades that the government refused to ...

Following best practices from previous federal post-wildfire soil-testing efforts, The Times collected samples from ...

A new study from the U.S. Geological Survey finds that groundwater in Appalachia, the Gulf Coast and California is ...

Minneapolis was ranked among the cities with the cleanest air, while Seattle was praised for its investment in green spaces and sanitation in a new study.

King County began testing its human-waste fertilizer, also known as biosolids, for PFAS chemicals (including PFOS) this year. County officials compared their findings to the California Bay Area Clean ...