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Air Quality

Air Pollutants - Particulate Matter (PM) - Standards & Requirements

State Implementation Plan (SIP)

The Clean Air Act requires each state to develop a State Implementation Plan (SIP) that outlines the state's strategy for controlling air pollution for each of the National Ambient Air Quality Standards (standard). A SIP is a plan that can include a narrative, models, regulations, programs, and other technical documentation that a state presents as evidence of its efforts to address air pollution and maintain good air quality.

The Clean Air Act requires states to involve the general public and industry through public hearings and opportunities to comment on the development of each state plan. States then submit the initial SIP or SIP revision to the U.S. Environmental Protection Agency (EPA) for approval. Once approved, the SIP is enforceable by the state and EPA.

An area that was once designated as nonattainment, but has been redesignated as attainment, must submit a maintenance plan, as required by section 175A of the Clean Air Act.

South Carolina has no maintenance plans for PM because
there have been no nonattainment areas for the 1997 or 2006 standards.

Transportation Conformity

The Clean Air Act also requires states with areas designated as nonattainment areas for Ozone (O3), carbon monoxide (CO), particulate matter (PM10 and PM2.5), or nitrogen dioxide (NO2) to demonstrate that any transportation plans, programs, and projects planned for the area are consistent with the state's air quality goals - attaining and maintaining the standards. South Carolina incorporated a Memorandum of Agreement into the SIP to satisfy the Interagency Consultation Requirements of the Federal Transportation Conformity Rule.

For more information please contact the Bureau of Air Quality at (803) 898-4123 or by email.