Tag: NAAQS

Air pollution, pollutants, smokestacks

Will Revised Cross-State Air Pollution Rule Extend Beyond Power Plants?

On October 15, 2020, the EPA proposed Cross-State Air Pollution Rule (CSAPR) revisions to reduce summertime nitrous oxides (NOx) emissions from upwind power plants in 12 states: Illinois, Indiana, Kentucky, Louisiana, Maryland, Michigan, New Jersey, New York, Ohio, Pennsylvania, Virginia, and West Virginia.

EPA Does Not Seek Change for Particulate Matter Standards

Asserting that there is no clear scientific evidence that more stringent standards would produce additional human health and environmental benefits, the EPA is proposing to retain without change the 2012 National Ambient Air Quality Standards (NAAQS) for particulate matter (PM).

Pregnancy

Pregnancy Study May Influence EPA’s Particulate Matter Review

In its current review of its 2012 National Ambient Air Quality Standards (NAAQS) for particulate matter (PM), the EPA may need to closely consider a new report from the National Toxicology Program (NTP) on the relationship between traffic-related air pollution (TRAP) and hypertension during pregnancy.

Power Plant Fossil Fuel Ozone

One Good Neighbor Provision Remanded; All Other Rule Challenges Denied

In a ruling that helps downwind states with areas in nonattainment with the 2008 National Ambient Air Quality Standards (NAAQS) for ozone, a panel of the U.S. Court of Appeals for the D.C. Circuit declined to vacate the EPA’s 2016 rule to update its Cross-State Air Pollution Rule (CSAPR). However, the court did remand one […]

2015 Ozone Primary NAAQS Upheld by D.C. Circuit

Two challenges filed from opposite directions against the EPA’s 2015 primary or health-based National Ambient Air Quality Standards (NAAQS) for Ozone were denied by a panel of the U.S. Court of Appeals for the D.C. Circuit. At one end, environmental and health advocacy groups argued that the standard was insufficiently protective of children. At the […]

Prescribed burn

How Recurring Prescribed Fires Fit into the NAAQS

The EPA’s Office of Air Quality Planning and Standards recently issued guidance on how information on prescribed fires on wildland may be factored into exceptional events demonstrations required by Section 319(b) of the Clean Air Act (CAA). If the Agency accepts a state’s exceptional event demonstration, air pollution resulting from the event is excluded from […]

EPA’s Air Monitoring Rule Upheld by D.C. Circuit

A panel of the U.S. Court of Appeals for the D.C. Circuit rejected challenges the Sierra Club mounted against procedures the EPA uses to approve plans states develop to monitor compliance with the National Ambient Air Quality Standards (NAAQS).