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The U.S. Supreme Court in a 5–4 vote blocked enforcement of the Environmental Protection Agency’s (EPA’s) final “Good Neighbor Plan,” a rule intended to significantly cut smog-forming nitrogen oxide (NOx) pollution from power plants and other industrial facilities in 23 states. In the meantime, the applicants, which include the states of Ohio, Indiana, and West […]

The Environmental Protection Agency (EPA) on March 15 issued the final “Good Neighbor Plan,” its latest iteration of the Cross-State Air Pollution Rule (CSAPR) that could require coal, oil, or gas steam power plants in 22 states to reduce their nitrogen oxide (NOx) emissions levels by 50% by 2027 compared to the 2021 ozone season. […]

In a significant but controversial final action, the Environmental Protection Agency (EPA) on Dec. 7 retained its existing National Ambient Air Quality Standards (NAAQS) for both fine and coarse particulate matter (PM2.5 and PM10). While the EPA said the decision came “after careful review and consideration of the most recent available scientific evidence and technical […]

Over its 50-year history, several rules issued by the U.S. Environmental Protection Agency (EPA) have reshaped the power sector. But for at least a few modern rules, the road has been full of turns. Notes: CAA = Clean Air Act; BSER = best system of emission reduction; CO2 = carbon dioxide; GHG = greenhouse gases; […]

The Environmental Protection Agency (EPA) has moved to redesignate four new areas of Missouri, Nebraska, Ohio, and Texas as being in attainment of air quality standards for sulfur dioxide (SO2).  The proposed actions issued over the past week provide a potential reprieve for several coal power plants, which would have needed costly pollution controls to […]

The Environmental Protection Agency (EPA) has finalized a change to a long-standing policy interpreting “ambient air”—a foundational concept under the Clean Air Act that applies to all types of air pollution, from ground-level ozone, particulate matter, and greenhouse gases. While the agency framed the change as part of a suite of actions to reform New Source […]

The Environmental Protection Agency (EPA) will refrain from amending the National Ambient Air Quality Standards (NAAQS) for sulfur dioxide (SO2), retaining a 2010 rule, which it said adequately protects public health.  The agency on Feb. 25 said in a notice that a periodically required review of the primary—or health-based—rule concluded no revision was necessary. The […]

While the Republican-led U.S. House and Senate in the 115th Congress was mainly focused on reviewing, for modification or repeal, several environmental rules issued under the Clean Air Act (CAA), the new Democrat majority in the House could focus on a slew of different measures, a new report from the Congressional Research Service (CRS) suggests.  […]

President Trump campaigned on a promise to reduce regulation and control regulatory costs. One of his first actions after taking office was to issue an executive order calling for the elimination of two existing regulations for every one new regulation issued. Toward that end, the Trump administration has acted or sought to reverse more than […]

The Environmental Protection Agency (EPA) does not intend to revisit national ambient air quality standards (NAAQS) for ozone that the Obama administration issued in 2015, a court filing shows.  The agency said in its final status report submitted to the U.S. Court of Appeals for the D.C. Circuit on August 1 that it has reviewed […]

The D.C. Circuit last week struck down parts of an Environmental Protection Agency (EPA) rule concerning implementation of its 2008 ozone standards, creating new regulatory limbo for the entities required to comply with the rule. Ruling in a set of cases consolidated under South Coast Air Quality Management District v. EPA (No. 15-1115), the federal […]

New York and Connecticut on January 17 filed suit to force the Environmental Protection Agency (EPA) to curb ground-level ozone blowing in from Illinois, Michigan, Pennsylvania, Virginia, and West Virginia with federal implementation plans (FIPs) issued under the “Good Neighbor Provision” of the 2008 National Ambient Air Quality Standards (NAAQS). The two states allege in their […]

The Environmental Protection Agency (EPA) is giving states an extra year to develop air quality plans related to the 2015-National Ambient Air Quality Standards (NAAQS) for ground-level ozone. In a June 6 letter sent to U.S. governors, EPA Administrator Scott Pruitt announced that the extended deadline for promulgating initial area designations for the rule issued […]

If the Clean Power Plan is scrapped or weakened, the Environmental Protection Agency (EPA) may be forced to regulate greenhouse gases (GHGs) emitted by existing power plant with wider repercussions under its National Ambient Air Quality Standards (NAAQS) program, experts have warned. While President-Elect Donald Trump promised to “scrap” the Clean Power Plan during his […]

Texas is the latest state to file suit against the Environmental Protection Agency (EPA) over its recently finalized standards for ozone. The state joins Arizona, Arkansas, Kentucky, New Mexico, North Dakota, Oklahoma, Utah, and Wisconsin, which have legally challenged the final version of the EPA’s National Ambient Air Quality Standards (NAAQS) for ozone since its […]

The Environmental Protection Agency (EPA) on Oct. 1 released the final version of new National Ambient Air Quality Standards (NAAQS) for ozone, cutting the current limit of 75 ppb to 70 ppb. The move sets the stage for a battle with Congress, the states, and a range of industries that have warned the new ozone […]

An emergency action proposed by Maryland regulators on Friday will require 14 coal-fired units in the state to minimize nitrogen oxide (NOx) emissions every day during the 2015 summer ozone season, starting as soon as May 1.  The rule submitted on April 17 by the Maryland Department of the Environment (MDE) to the Joint Committee […]

Estimates vary widely, but even the Environmental Protection Agency acknowledges that lowering the ozone standard will cost billions. How will it affect power companies? It could make approval of new projects much more difficult. Even in the annals of expensive environmental regulations and the hyperbole that often accompanies them, the numbers are eye-popping: $140 billion […]

The Byron Sher Auditorium in Sacramento, Calif., was filled at times with students, parents, and other concerned citizens as the Environmental Protection Agency (EPA) held the last of three public hearings on proposed updates to the national air quality standards for ground-level ozone on Feb. 2. The hearings were scheduled as part of the policymaking […]

Compliance cost estimates for a revised ozone national ambient air quality standard (NAAQS) soon to be proposed by the Environmental Protection Agency (EPA) “will be little better than guesses,” the Congressional Research Service (CRS) says in a recent document.  The NAAQS does not directly impose emission controls on industry, “but it sets in motion a process […]

The U.S. Supreme Court on Monday declined to take up industry’s challenge to a federal court ruling that upheld the Bush administration’s air quality standard for ozone.  The high court’s denial leaves intact the D.C. Circuit’s July 2013 decision upholding the Environmental Protection Agency’s (EPA’s) last revision of its National Ambient Air Quality Standards (NAAQS) […]

The U.S. power sector has seen a number of developments on the regulatory front in recent months. Here’s where major federal rules stand today. (For a more dynamic and graphic version of this article, see http://powermag.com/long-form-stories/bw-power/ .) GHG Rules New Power Plants. The Environmental Protection Agency (EPA) in September 2013 revised a 2012 proposal to […]

Revised national ambient air quality standards (NAAQS) for ozone that are expected from the Environmental Protection Agency (EPA) this December will likely be stricter.  Agency staff from the Office of Air Quality Planning and Standards in a 597-page final policy assessment released on Aug. 29 recommend revising the standard to within a range of 60 […]