Edit/update: it appears that Gregory's post is a misinterpretation. My bad, this hasn't been my experience with his posts before. So glad we can edit posts here.
Here is an explanation of the change: https://mastodon.social/@jik@federate.social/113853120850471746
Previous text for transparency:
Heads-up: new CDC data baseline change alters Covid wastewater reporting to artificially reduce community transmission levels. Going forward wastewater will look like the US has "no Covid" per its official (CDC) data.