SIP Approval: Wyoming (infrastructure requirements for the 2008 lead, 2008 ozone, 2010 nitrogen dioxide, 2010 sulfur dioxide, and 2012 fine particulate matter NAAQS).

SIP Approval: Wyoming (infrastructure requirements for the 2008 lead, 2008 ozone, 2010 nitrogen dioxide, 2010 sulfur dioxide, and 2012 fine particulate matter NAAQS).

EPA is postponing the final rule that amends the effluent limitations guidelines and standards for the steam electric point source category under the CWA pending judicial review.

EPA is postponing the final rule that amends the effluent limitations guidelines and standards for the steam electric point source category under the CWA pending judicial review.

EPA is postponing the final rule that amends the effluent limitations guidelines and standards for the steam electric point source category under the CWA pending judicial review.

SIP Proposal: District of Columbia-Maryland-Virginia (DC-MD-VA marginal ozone nonattainment area attained the 2008 ozone NAAQS).

SIP Proposal: District of Columbia-Maryland-Virginia (DC-MD-VA marginal ozone nonattainment area attained the 2008 ozone NAAQS).

SIP Proposal: District of Columbia-Maryland-Virginia (DC-MD-VA marginal ozone nonattainment area attained the 2008 ozone NAAQS).

EPA proposed a NPDES general permit regulating discharges from oil and gas wells in the stripper subcategory which discharge into waters in Texas.

EPA proposed a NPDES general permit regulating discharges from oil and gas wells in the stripper subcategory which discharge into waters in Texas.