At the same time, other experts say some PFAS compounds, unlike the trichlororethylene that’s been in the south-side’s aquifer for many decades, can move quickly in groundwater, rather than ...

The Air National Guard will begin a full-scale investigation this fall of groundwater contamination by toxic PFAS compounds near its Morris Air National Guard Base on Tucson’s south side.

Past groundwater contamination, which once spread in a plume that extended to the Columbia River, has previously been addressed. Next month treatment of the groundwater contamination is expected ...

Those limits on PFAS, which are human-made and don’t easily break down in nature, were expected to reduce their levels for millions of people. Limits on three types of PFAS, including what are known ...