EPA proposed to approve a tribal implementation plan submitted by the Mashantucket Pequot Tribal Nation that includes permitting requirements for major and minor sources of air pollution.

EPA amended the electronic reporting requirements for NESHAPs for coal- and oil-fired electric utility steam generating units, also known as the mercury and air toxics standards (MATS); the amendments are intended to reduce reporting burden, increase MATS data flow and usage, and improve compliance assessment.

Under §122(i) of CERCLA, EPA entered into a proposed administrative settlement for recovery of past and projected future response costs concerning the Hamilton/Labree Roads groundwater contamination site in Chehalis, Washington.

EPA performed a periodic review of the emissions standards and other requirements for other solid waste incineration units (OSWI) under the CAA, and proposed changes to the OSWI new source performance standards and emission guidelines that are not specifically based on the statutory periodic review.

EPA proposed a rule correcting an error in the Agency’s regulations for test procedures used in the Corporate Average Fuel Economy program as finalized in a 2012 rulemaking; the correction clarifies the method for how flex-fuel vehicles are accounted for in manufacturer fuel economy calculations in model years 2020 and later.

EPA finalized a rule correcting an error in the Agency’s regulations for test procedures used in the Corporate Average Fuel Economy program as finalized in a 2012 rulemaking; the correction clarifies the method for how flex-fuel vehicles are accounted for in manufacturer fuel economy calculations in model years 2020 and later.

EPA tentatively approved revisions to the Navajo Nation’s public water system supervision program.

EPA announced its intention to approve revisions to Kentucky’s public water system supervision program.

EPA announced the availability of data on the administration of the assurance provisions of the Cross-State Air Pollution Rule trading programs for the control periods in 2019.

EPA finalized regulations to implement the D.C. Circuit’s vacatur of the Agency’s 2015 provisions regarding national minimum criteria for coal combustion residuals (CCR) landfills and CCR surface impoundments.