New CSAPR NOx Regulations

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The EPA is proposing a federal plan that would cut pollution from power plants and industrial sources that significantly contribute to unhealthy levels of ground-level ozone, or smog, for millions of Americans who live downwind. 

Beginning in 2023, EPA is proposing to include electric generating units in 25 states in the Cross-State Air Pollution Rule (CSAPR) NOX Ozone Season Group 3 Trading Program, which would be revised and strengthened for the 2015 ozone NAAQS. And, beginning in 2026, EPA is proposing emissions standards for certain industrial sources in 23 states that have a significant impact on downwind air quality.

EPA’s proposed limits on NOX pollution from power plants would build upon the demonstrated success of existing CSAPR trading programs by including additional features that promote consistent operation of emission controls to enhance public health and environmental protection for the region and for local communities. These features include daily emissions rate limits on large coal-fired units to promote more consistent operation and optimization of emissions controls, limits on “banking” of allowances, and annual updates to the emission budgets starting in 2025 to account for changes in the generating fleet.

EPA is proposing emissions standards for new and existing emissions units in these selected industries:

  • reciprocating internal combustion engines in Pipeline Transportation of Natural Gas;
  • kilns in Cement and Cement Product Manufacturing;
  • boilers and furnaces in Iron and Steel Mills and Ferroalloy Manufacturing;
  • furnaces in Glass and Glass Product Manufacturing; and
  • high-emitting, large boilers in Basic Chemical Manufacturing, Petroleum and Coal Products Manufacturing, and Pulp, Paper, and Paperboard Mills.

 

This proposal implements the Clean Air Act’s “good neighbor” or “interstate transport” provision, which requires each state to submit a State Implementation Plan (SIP) that ensures sources within the state do not contribute significantly to nonattainment or interfere with maintenance of the NAAQS in other states. Each state must make this new SIP submission within 3 years after promulgation of a new or revised NAAQS.

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