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EPA air chief William Wehrum is said to be leaning against reconsidering the Obama-era decision to tighten the ozone national ambient air quality standard (NAAQS) from 75 parts per billion (ppb) to 70 ppb, instead aiming to speed up the next Clean Air Act-mandated NAAQS review as a potential vehicle to weaken the limit, sources say.

A federal district court judge has vacated the Trump administration's delay of an Obama-era rule bolstering training requirements for applicators of certain pesticides, holding that EPA violated the Administrative Procedure Act (APA) in delaying the rule without seeking public input and that farmworker groups face harms from the delay.

Environmentalists are previewing their likely court challenge to Oklahoma's first-of-its-kind permit program for coal ash disposal, arguing in comments on EPA's proposed approval of the permit regime that regardless of its technical mandates the state's lack of enforcement resources and public-input policies constitute fatal flaws in the plan.

EPA appears to have largely escaped Trump administration plans to cut its budget by 31 percent in fiscal year 2018 after lawmakers unveiled a spending bill for the remainder of the year that funds the agency at essentially FY17 levels while also increasing funding for key infrastructure programs.

The Sierra Club in a new legal brief is attacking changes the Obama EPA made to air quality monitoring policies and claiming the revisions unlawfully weakened states’ substantive monitoring requirements, among other criticisms, in a suit that appears to have been revived by Trump EPA Administrator Scott Pruitt's order banning “sue-and-settle” pacts.

ST. PAUL, MN -- EPA and state regulators are continuing months-long talks on streamlining agency reviews of states' federally-delegated programs, seeking to clarify the level of deference EPA staff should afford state regulators and crafting a policy for elevating disputes among lower-level officials during permitting or enforcement reviews.

A series of new legal briefs from several states, power companies and environmental groups highlights wide-ranging and often competing attacks on the Obama EPA's “update” to its Cross-State Air Pollution Rule (CSAPR) emissions trading program, a program that the Trump administration is defending in ongoing appellate litigation.