Final SIP: Idaho (delaying fine particulate matter SIP for the Idaho portion of the Logan, Utah/Idaho nonattaiment area).

Final SIP: Idaho (delaying fine particulate matter SIP for the Idaho portion of the Logan, Utah/Idaho nonattaiment area).

Final SIP: Idaho (delaying fine particulate matter SIP for the Idaho portion of the Logan, Utah/Idaho nonattaiment area).

SIP Approval: Vermont (1997 fine particle matter, 1997 ozone, 2006 fine particulate matter, 2008 lead, 2008 ozone, 2010 nitrogen dioxide, and 2010 sulfur dioxide NAAQS).

SIP Approval: Vermont (1997 fine particle matter, 1997 ozone, 2006 fine particulate matter, 2008 lead, 2008 ozone, 2010 nitrogen dioxide, and 2010 sulfur dioxide NAAQS).

SIP Approval: Vermont (1997 fine particle matter, 1997 ozone, 2006 fine particulate matter, 2008 lead, 2008 ozone, 2010 nitrogen dioxide, and 2010 sulfur dioxide NAAQS).

EPA entered into a proposed settlement agreement under CERCLA that requires the settling party to enact a land use ordinance and conduct operations and maintenance activities over the Quartz Hill Tailings Pile, within the Central City/Clear Creek Superfund site in Central City, Colorado.

EPA entered into a proposed settlement agreement under CERCLA that requires the settling party to enact a land use ordinance and conduct operations and maintenance activities over the Quartz Hill Tailings Pile, within the Central City/Clear Creek Superfund site in Central City, Colorado.

EPA entered into a proposed settlement agreement under CERCLA that requires the settling party to enact a land use ordinance and conduct operations and maintenance activities over the Quartz Hill Tailings Pile, within the Central City/Clear Creek Superfund site in Central City, Colorado.

EPA published an initial inventory report of the supply, use, and trade of mercury in accordance with the Lautenberg Act and TSCA.