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Dallas-Fort Worth State Implementation Plan (SIP)

skyThe Federal Clean Air Act (CAA) requires states with areas failing to meet the National Ambient Air Quality Standards (NAAQS) prescribed for criteria pollutants to develop a State Implementation Plan (SIP). The SIP describes how the state will reduce and maintain air pollution emissions in order to comply with the federal standards. Important components of a SIP include emission inventories, motor vehicle emission budgets, control strategies, and attainment demonstration.

The Texas Commission on Environmental Quality (TCEQ) develops the Texas SIP for submittal to the US Environmental Protection Agency (EPA). One SIP is created for each state, but portions of the plan are specifically written to address each of the nonattainment areas (e.g. a “Dallas-Fort Worth SIP”). The original document for Texas was approved in May 1972, with the most recent revision completed in 2016.

As changes are needed, the SIP is revised rather than rewritten in its entirety. Revisions are often prompted by new federal or state regulations, new modeling techniques, or a change in an area’s attainment status. In May 2012, the EPA released final designations for nonattainment areas based on the revised 2008 eight-hour ozone standard, less than or equal to 75 ppb.  These new designations require nonattainment areas to update the SIP to address the new, lower standard. The revised SIP was due to the EPA by 2015, with an attainment deadline of 2018.

2015 Attainment Demonstration (AD) SIP

Use the following links to explore various aspects of the SIP.

Related Committees

TCEQ SIP Hot Topics


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