CAA - EPA OCS Regulations
The 1990 amendments to the CAA transferred jurisdiction from the DOI to the EPA for all
OCS areas, except for the Gulf of Mexico west of 87.5 degrees longitude. Section 328 of the Clean
Air Act provides the legislative authority for the transfer of jurisdiction. For
those OCS areas subject to EPA jurisdiction, regulations for sources located within 25
miles of a State’s seaward boundary, must be the same as those applied in the nearest
onshore area. For areas more than 25 miles from the State’s seaward boundary,
general EPA provisions apply. In 1992 the EPA promulgated the OCS
air regulations. Enforcement of these regulations may be delegated to a State
provided it is approved by EPA.
The Role of the States
The States have the primary responsibility for developing pollution control plans,
permitting, monitoring, and enforcement under the general oversight of EPA. The
States listed below are of importance to MMS regarding coordination of air quality review
activities. Many of the sites also have air quality measurement data.
