Introduction to the Louisiana SIP

This page provides general information about State Implementation Plans (SIPs). The Louisiana SIP, like that of all states, is required by federal law:

What is a SIP?

A State Implementation Plan (SIP) is an enforceable plan developed at the state level that explains how the state will comply with air quality standards according to the Federal Clean Air Act (CAA). A SIP must be submitted by the state government of any state that has areas that are designated in nonattainment of Federal air quality standards. In order to understand SIPs, you should understand the role of the following:
  • Federal Clean Air Act
The federal (CAA) is the legal foundation for the national air pollution control program. The CAA requires each state to produce and regularly update a SIP. The CAA also requires that SIPs include a description of control strategies, or measures to deal with pollution, for areas that fail to achieve the national ambient air quality standards (NAAQS). Finally, the CAA grants powers of enforcement to the Environmental Protection Agency (EPA).
  • Environmental Protection Agency
  • National Ambient Air Quality Standards 

NAAQS are established by the EPA as directed by the Federal CAA. These standards measure six outdoor air pollutants:


Why do we prepare SIPs?

There are numerous reasons why SIPs are necessary and important.
  • SIPs are required by law: The Federal CAA requires states with areas failing to meet NAAQS to produce a SIP.
  • Failure to produce a SIP has consequences: If a state fails to submit or implement a SIP, or if it submits a SIP that is unacceptable to the EPA, the EPA has the power to impose sanctions or other penalties on that state. Typical sanctions include cutting off Federal highway funds and setting more stringent pollution offsets for certain emitters. Offsets are the reduction of current emissions at a rate equal to or greater than the amount of emissions expected to be produced in a new project.

How do SIPs affect me?

Louisiana's SIP affects you in numerous ways.
  • As an individual
  • As a business
