Why does southeastern Wisconsin need a vehicle inspection program?
Southeastern Wisconsin has an air quality problem that requires a multi-faceted approach to solve. In order to achieve the 1-hour air quality standard, the Wisconsin Department of Natural Resources has developed a plan (State Implementation Plan) that requires a 24% reduction in hydrocarbon (HC) emissions in the Milwaukee area. The Wisconsin Vehicle Inspection Program (WIVIP) contributes about one-fourth of that 24% reduction. So far, no other control strategies have been found that could replace the WIVIP test.
