Our local school district's most recent water testing seems to have just been for lead. It resulted in a 229 page document outlining how, when, and where they tested every single tap in all the schools and what the results were. I've not seen mention of PFAS testing in our schools, which is where I'd expect to see it first.
Maybe it depends on how they expect the contamination to get in? Lead usually gets in through the local pipes, so it makes sense to test it at the taps. For contaminations that get in from the water intake at the plant it does make more sense to test them there.
