The Maricopa County Air Quality Department is in the process of administering a federal grant to local organizations as part of an effort to improve air quality while doing away with diesel emissions.

The Maricopa County Air Quality Department (MCAQD) said Arizona Solar One, operators of Solano Generating Station in Gila Bend, has agreed to pay a $1.5 million fine for violations of air quality regulations that occurred between June 2014 and January 2016.