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Under a new EPA proposal, a major source of hazardous air pollutants (HAPs) could be reclassified as an area source at any time by limiting its potential to emit (PTE) HAPs to below the major source thresholds of 10 tons per year (tpy) of any single HAP or 25 tpy of any combination of HAPs. […]
The EPA’s broad discretion under the Clean Air Act (CAA) to select the measures to achieve and maintain air quality was affirmed by a panel of the U.S. Court of Appeals for the D.C. Circuit in a ruling addressing cross-state air pollution.
The EPA’s Clean Air Act Stationary Source Compliance Monitoring Strategy (CMS) describes the Agency’s approach for EPA regional offices, states, Indian tribes, and localities to assess and document compliance with permits and regulations at major stationary and synthetic minor sources.
In a letter to EPA Administrator Andrew Wheeler, a bipartisan group of six senators added their voice to those urging the Agency to leave in place its Mercury and Air Toxics Standards (MATS).
Hours before the EPA put almost all of its 14,000 workers on furlough because of the government shutdown, the Agency announced its latest measure to preserve coal-fired power in the United States.
The EPA’s implementation of Clean Air Act (CAA) Section 110(a)(2)(D)(i)(I), also known as the Good Neighbor Provision, has been a source of conflict among the Agency, the states, industry stakeholders, and public health and environmental interest groups. That trend is continuing with the Agency’s latest action, a final rule that establishes that 20 eastern states […]
The EPA’s definition of ambient air—and specifically which air is not considered ambient—is a critical consideration in Clean Air Act regulatory decisions.
In a deregulatory action, the EPA is proposing to amend an Obama-era rule that extended certain regulations promulgated under Clean Air Act (CAA) Section 608, which apply to Class I and II refrigerants that are ozone-depleting substances (ODSs), to non-ODSs used as substitute for ODSs.
Under a new EPA proposal, approximately 310 sources subject to monitoring under the Agency’s NOx SIP Call regulations would be able to use options to the emissions monitoring requirements now required by the regulations.
In a majority opinion, a panel of the U.S. Court of Appeals for the 9th Circuit found that Oregon state violated neither the dormant Interstate Commerce Clause nor a provision of the federal Clean Air Act (CAA) when it assigned a carbon intensity value to transportation fuels produced out of state and imported into Oregon, […]