In what year was the Enhanced Emissions Program implemented in Pennsylvania?

The Enhanced Emissions Program in Pennsylvania was implemented in 1998 as a response to the need for stricter pollution control measures in areas that did not meet federal air quality standards. This program was designed to improve air quality by requiring more rigorous vehicle emissions testing in certain regions of the state. By implementing this program, Pennsylvania aimed to reduce the levels of harmful emissions from vehicles, thereby improving public health and environmental conditions. The choice of 1998 is significant as it marked a crucial step forward in the state's efforts to align with federal regulations regarding vehicle emissions and air quality standards.