WOTUS and PM NAAQS and PFAS, Oh My! Environmental Highlights in First Quarter 2023

The proposed NAAQS for PM setting a lower and more stringent standard, if adopted, will mean that several areas in Illinois will be designated as nonattainment.
The proposed NPDWR for PFAS will affect public drinking water industries by requiring more reduction, testing, and notice of PFAS.
The definition of WOTUS reverting back to the pre-2020 WOTUS rule would have provided more assurance in the usage of the term in future instances (though the long-awaited WOTUS decision in Sackett II was issued in the second quarter of 2023).