"The Trump administration is ratcheting up its threats against California with a letter warning the state faces sanctions – including cuts in federal highway funding – over its “failure” to submit complete reports on its implementation of the Clean Air Act.
In the letter to the California Air Resources Board, Andrew Wheeler, administrator of the Environmental Protection Agency, wrote that the state had the “worst air quality in the United States” and had “failed to carry out its most basic tasks” under the federal law.
That law requires states to submit implementation plans to the EPA outlining their efforts to cut emissions of six types of pollutants. When President Donald Trump entered office, the administration faced a backlog of over 700 reports, and roughly 140 of those that remain are from California, Wheeler said in an interview."
Michael Wilner reports for the Sacramento Bee September 23, 2019.