What agency oversees emissions testing in Pennsylvania?

The Pennsylvania Department of Environmental Protection (DEP) is responsible for overseeing emissions testing within the state. The DEP implements regulations to monitor air quality and control pollution, making it the primary agency focused on environmental protection and compliance with emissions standards. This involves managing various programs that ensure that emissions from vehicles and other sources meet legal requirements for air quality.

The Pennsylvania Department of Motor Vehicles primarily focuses on vehicle registration, licensing drivers, and maintaining driving records, rather than directly overseeing emissions testing. The Environmental Protection Agency (EPA) operates at the federal level and establishes nationwide regulations, but the implementation and oversight of those regulations at the state level fall under the jurisdiction of state agencies like the DEP. The Pennsylvania Department of Transportation manages transportation infrastructure and planning rather than emissions testing specifically.

Thus, the role of the DEP in establishing and enforcing standards makes it the correct answer for the agency overseeing emissions testing in Pennsylvania.