Military Bases Are Rife With ‘Forever Chemicals.’ New Mexico Wants Them Cleaned Up.

The state is leading the country’s reckoning with PFAS. The outcome of its suit against the federal government will affect how courts treat more than 15,000 other claims nationwide.Art Schaap, right, a dairy farmer in Clovis, N.M., and James Kenney, of the New Mexico Environment Department, stand in the area where Mr. Schaap had to kill his cattle.