Last week, the D.C. Circuit Court of Appeals rejected arguments by states and industry groups that the Transport Rule — or Cross-State Air Pollution (CSAPR) — was overly burdensome. While the D.C. Circuit kept the Transport Rule in place, the Court ordered the EPA to relax sulfur dioxide (SO2) and nitrogen oxide (NOX) standards for 13 states, including Alabama, which contribute to soot and smog along the East Coast.

The Clean Air Act’s “good neighbor” provision proscribes upwind states from emitting any air pollutant in amounts that will contribute significantly to nonattainment of a downwind state. The Transport Rule regulates two different kinds of interstate air pollution.

First, CSAPR regulates upwind emissions that contribute significantly to nonattainment in downwind states. Second, CSAPR regulates upwind emissions that interfere with maintenance of ambient air quality standards in downwind states that have achieved attainment.

In other words, the rule says power plants in one state shouldn’t pollute the air in another state so much that it causes areas in that state to exceed science-based air quality standards.

The EPA created this rule because pollution emitted in upwind states can travel to downwind states. As the Supreme Court of the United States recognized in its decision in EPA v. EME Homer City Generation, L.P. “some downwind states to which the pollution travels are unable to achieve clean air because of the influx of out-of-state pollution.”

The EPA rightly chose to recognize that air pollution can and does travel across state lines and thus regulations of air pollutions in states should recognize this fact. The D.C. Circuit Court agrees with this rationale, and thus was a key reason the Transport Rule was upheld.

By remanding without vacatur to EPA, the Court permitted the Transport Rule to remain in effect. The Court held that the 2014 SO2 and NOX emissions budgets for thirteen states were invalid. The Court reasoned that EPA’s uniform emissions reductions on upwind states under the Transport Rule exceeded EPA’s authority.

Despite some headlines and articles suggesting otherwise, the Transport Rule was not struck down last week. However, EPA will have to revisit the emissions budgets for certain upwind states.

The Transport Rule remains in effect, therefore Alabamians will still be able to enjoy the health benefits and improved air quality due to the rule while the EPA adjusts the emissions budgets for sulphur-dioxide and nitrogen-oxide.

Estimated Annual Number of Adverse Health Effects Avoided Due to Implementing the CSAPR*
Health Effect Number of Cases Avoided
Premature mortality 13,000 to 34,000
Non-fatal heart attacks 15,000
Hospital and emergency department visits 19,000
Acute bronchitis 19,000
Upper and lower respiratory symptoms 420,000
Aggravated asthma 400,000
Days when people miss work or school 1.8 million

Source: http://www.epa.gov/airtransport/CSAPR/

 

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