Regulation & law · 13/09/1995Updated: 10/18/2026 · 1 min read

USEPA Removes All TSP Designations in Wisconsin

The Environmental Protection Agency (EPA) has removed all total suspended particulate (TSP) area designations in Wisconsin, following a request from the Wisconsin Department of Natural Resources (WDNR) to redesignate several cities from nonattainment to attainment or unclassifiable for particulate matter (PM).