EPA proposal for largest NOx emitter in US

The EPA has proposed the implementation of best available technology for NOx reduction for the Four Corners power plant located within the Navajo Nation in New Mexico.  The technology proposed for the plant is selective catalytic reduction.  One of the priorities driving the EPA’s initiative is the 16 national parks in the area.  NOx compounds cause haze, visibility issues, and other air quality issues around the parks.  According to the EPA press release the Clean Air Act’s Regional Haze Rule requires this variety of retrofit on older coal fired plants in certain circumstances.  Once complete the project could reduce annual NOx production at the power plant by 36,000 tons per year.