Six states with drinking water standards for so-called “forever chemicals” are now wrestling with what those limits mean when water contamination from Department of Defense sites seep into their communities.

Members of Congress from both parties are starting to vent their frustration at military foot-dragging even as the states take different paths to address the contamination. One state is suing. Another must wait years for an investigation to end. A third is keeping a watchful eye on the Biden administration.