89 FR 54753
SIP Proposal: California (motor vehicle inspection and maintenance program requirements for the 2015 eight-hour ozone NAAQS).
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89 FR 54748
SIP Proposal: California (revisions concerning nitrogen oxide (NOx) emissions from boilers, gas turbines, and miscellaneous combustion units, and reasonably available control technology requirements for major source of NOx in the Sacramento Metro ozone nonattainment area).
89 FR 54362
SIP Approval: Iowa (recent changes to Linn County ordinances).
89 FR 54358
SIP Approval: Utah (revisions to air quality rules).
89 FR 54396
SIP Proposal: New Jersey (interstate transport requirements for the 2010 one-hour sulfur dioxide primary NAAQS).
White v. United States Environmental Protection Agency
A district court denied a commercial fisherman's motion to preliminarily enjoin the Army Corps of Engineers and EPA from enforcing a 2023 rule that revised the definition of "waters of the United States." The fisherman argued the agencies did not faithfully implement the Sackett v. Environmental Pro...
Texas v. New Mexico
The U.S. Supreme Court, 5-4, denied two states' motion to enter into a consent decree in a lawsuit concerning a 1938 interstate agreement that apportions the waters of the Rio Grande River among Colorado, New Mexico, and Texas. Texas initially sued Colorado and New Mexico, arguing excessive groundwa...
Ohio v. Environmental Protection Agency
The U.S. Supreme Court, 5-4, granted three states' and several industry groups' applications to stay enforcement of EPA's 2023 rule issuing a federal implementation plan (FIP) for 23 states whose SIPs the Agency determined had failed to adequately address new air quality standards for ozone levels u...