Well, if you believe groups like "Whidbey Water Keepers" and the closely aligned "Coupeville Community Allies" (aka COER) all these results that the Navy is getting are entirely bogus because the Navy is simply not testing for the correct chemicals.

Their pitch to people who they want to pay instead for private well testing is:

"The chemicals they will test for (via Vista Analytical Laboratory) are PFOS, PFOA, PFHxS, PFHpA, PFNA and PFBS. The latter 3 are critical in being able to demonstrate a link to the the fire fighting retardant used by the Navy.  The Navy did not test for the 3 chemicals that would link them to the firefighting foam."