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Ozone Pollution

Maximum Clean Air Act (CAA) Timeframe Associated With Each SIP Element (From Effective Date of Designation)

Note: this applies to the 2008 National Ambient Air Quality Standards (NAAQS) for ozone.

Emission inventories and emission statement SIPs

For states with Marginal and higher areas:

  • due no later than 2 years (July 20, 2014)

Reasonably Available Control Technology (RACT) SIPs

For Moderate and higher areas, and all states in the Ozone Transport Region (OTR):

  • no later than 2 years (July 20, 2014)

15% Reasonable Further Progress (6-year ROP/RFP) SIPs

For Moderate and higher areas:

  • no later than 3 years (July 20, 2015)

Nonattainment NSR (NNSR) SIPs

  • no later than 3 years (July 20, 2015)

Attainment plan with Reasonably Available Control Measures (RACM), and attainment demonstration SIPs

For Moderate areas:

  • no later than 3 years (July 20, 2015)

For Serious and higher:

  • 4 years (July 20, 2016)

RFP SIPs showing an average of 3% reduction in emissions per year after the initial 6-year period

For Serious and higher areas:

  • no later than 4 years (July 20, 2016)

Vehicle I/M program SIP

Where applicable:

  • no later than an area’s attainment demonstration deadline

Stationary source penalty fee program SIPs (§185)

For Severe and Extreme areas:

no later than 10 years (July 20, 2022)