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Here’s another link: (they are going after more than coal plants)

EPA Proposes “Good Neighbor” Plan to Cut Smog Across Much of the United States
https://www.epa.gov/newsreleases/epa-proposes-good-neighbor-plan-cut-smog-across-much-united-states
“Following the science and the law, this ‘good neighbor’ plan will better protect the health of Americans across the country,” said EPA Administrator Michael S. Regan. “Air pollution doesn’t stop at the state line. This step will help our state partners meet air quality health standards, saving lives and improving public health in smog-affected communities across the United States.”
EPA evaluated air quality modeling, annual emissions, and information about potential controls to determine which industries beyond the power sector could have the greatest impact in providing ozone air quality improvements in affected downwind states. As a result, EPA is proposing emissions standards for new and existing emissions units in these selected industries:

-reciprocating internal combustion engines in Pipeline Transportation of Natural Gas;
-kilns in Cement and Cement Product Manufacturing;
-boilers and furnaces in Iron and Steel Mills and Ferroalloy Manufacturing;
-furnaces in Glass and Glass Product Manufacturing; and
-high-emitting, large boilers in Basic Chemical Manufacturing, Petroleum and Coal Products Manufacturing, and Pulp, Paper, and Paperboard Mills.