SIP Approval: New Hampshire (revisions to establish nitrogen oxide reasonably available control technology requirements for coal-fired cyclone boilers). 

SIP Proposal: California (revisions to San Diego County Air Pollution Control portion of plan to expand existing provision that exempts tub grinders and trommel screens that process green material from permit requirements to include horizontal grinders and processing of mixtures of green material and food material). 

SIP Approval: New Hampshire (amendments to motor vehicle inspection and maintenance program regulation).

EPA proposed to approve a CAA §111(d)/129 state plan submitted by South Carolina for implementing and enforcing the emissions guidelines applicable to existing commercial and industrial solid waste incineration units. 

EPA finalized national primary drinking water regulations for six per- and polyfluoroalkyl substances (PFAS): perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), hexafluoropropylene oxide dimer acid (HFPO-DA), and perfluorobutane sulfonic acid (PFBS); the Agency also finalized a Hazard Index of 1 as the maximum contaminant level goal and maximum contaminant level for any mixture containing two or more of PFHxS, PFNA, HFPO-DA, and PFBS.

NOAA announced the availability of final evaluation findings for seven state and territory coastal management programs and four national estuarine research reserves under the CZMA. 

EPA amended specific provisions in the Greenhouse Gas Reporting Rule to improve data quality and consistency. 

EPA approved a request from the New Jersey Department of Environmental Protection for delegation of authority to implement and enforce the federal plan requirements for municipal solid waste landfills that commenced construction on or before July 17, 2014, and have not been modified or reconstructed since July 17, 2014. 

SIP Approval: Indiana (temporary alternative opacity limitations at the BP Products North America, Inc. facility in Whiting, Indiana, during startup and shutdown). 

SIP Proposal: Michigan (revisions to state air pollution control rules concerning air use approval).