Figure 1. Summer surge slipping into fall.

The national level of virus in wastewater has slipped from high to moderate in 2 weeks. In the 31 states with at least moderate levels of infections (>3.4 on wastewater scale; >5.3 to 7.8, high; >7.8, very high) in the week ending September 20, 74% dropped in the 2 weeks from September 6.

Tap on curves to see data for individual states, which are in increasing order of virus levels for September 20: IL, NH, IA, OH, HI, WI, TX, WY, VA, ME, SC, KY, AR, MN, MT, MA, LA, CA, NY, NC, AL, RI, OR, WA, SD, IN, NE, UT, DE, CT, NV.
Chart: Henry A. Choy, COVID and Vaccine UpdateSource: Derived from CDC dataCreated with Datawrapper