Maintaining the status quo is an incredibly valuable position for democratically elected politicians to have. Joe Biden’s entire campaign is built on “I won’t change anything except spruce up the ACA a bit.”
Representative democracy involves various groups focusing attention on one issue or the other. When it comes to things like drinking water or food, people’s fear of “impure” food can cause public panic vastly out of proportion to the actual problem. Nobody is thinking “hmm, would I give up stain resistant carpets and clothing and non-stick pans for a negligible lower risk of getting testicular cancer?”
PFAS are, at this point, a cause for study, not a cause for dramatic action: https://www.consumerreports.org/toxic-chemicals-substances/p...
The two most studied, PFOA and PFOS are no longer produced in the US. The others are not well studied:
> But the health effects of the PFAS chemicals used instead of PFOS and PFOA are less known. As these newer chemicals accumulate in the drinking water in some areas of the U.S., scientists and state officials are trying to determine how they affect humans. At least some of them can be eliminated from the body more quickly than PFOS and PFOA and may be less toxic, according to DeWitt—but they still might cause problems, she cautions.
PFAS chemicals have been in wide use since the 1950s. Clearly they are reasonably safe. The question is whether the potential health benefits of reducing their use outweigh the cost of losing their advantages.
Here, there was no “cover up.” Nobody was hiding the measurements of the levels of PFAS in water systems. The question was whether the DHHS should issue a guideline that would set the PFAS target at a level 1/10th as high as what is present in many public water systems is not something that necessarily should happen. After all, how are they deriving that guideline? When you have exposure dependent chemicals, you can’t set the limits at the lowest levels where no harmful effects are detectable. (Remember how everything in California has a cancer warning?) There needs to be a global optimization process that balances benefits and costs. In that context, it was entirely reasonable and proper to refrain from setting such a guideline at this time.
(PFAS are just one example of things that trigger a panic completely out of proportion to actual risk. Another example is alcohol during pregnancy. The medical community in the US has taken the position, with the support of the government, that the only acceptable level is 0. That is even though women in Western Europe routinely drink moderate amounts of alcohol during pregnancy, with seemingly little ill effect.)