EPA Lowers Ozone Standard from 75 to 70 ppb

Via the Washington Times:

The Environmental Protection Agency on Thursday tightened the federal ozone standard, dismissing the concerns of powerful business groups and setting off a regulatory and legal fight that will last for the remainder of President Obama’s time in office.

The agency’s updated ozone regulations lower the standard from 75 parts per billion (ppb) to 70 parts per billion.

Roanoke’s air quality has been steadily improving, and even at this level we wouldn’t have had an Air Quality Action Day since 2012.

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