EPAFinal Rule
Approval and Promulgation of Air Quality Implementation Plans; West Control of Ozone Season Nitrogen Oxide Emissions
EnvironmentHealthcareEnergy
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Summary
The EPA is approving a plan to reduce nitrogen oxide emissions from power plants and industrial facilities during summer months when ozone pollution is worst in the western United States. This regulation helps protect air quality and public health by limiting pollution that contributes to smog and respiratory problems.
Key Points
- 1Power plants and factories in the western U.S. must reduce their nitrogen oxide emissions during ozone season (typically May-September) to help decrease smog
- 2The regulation sets specific emission limits for industrial facilities to meet air quality standards set by the Clean Air Act
- 3States must develop and follow implementation plans showing how they will help their regions meet federal air quality goals
- 4The rule primarily affects energy producers and manufacturers in western states, which must invest in cleaner technology or operational changes
- 5Better air quality benefits millions of people by reducing respiratory diseases, asthma, and other health problems linked to ground-level ozone
Impact Assessment
If you are an Energy Company or industrial facility operator, this means you must reduce nitrogen oxide emissions during summer ozone season in western states, likely requiring equipment upgrades or operational changes.
Impact Level
Significant
Geographic Scope
Regional
Compliance Cost
Significant
Who is Affected
Energy CompaniesManufacturersState Governments
Key Dates
Published
October 3, 2025
Regulatory Connections
Authorized By
Amends CFR Sections
40 CFR Part 51
Other Documents in This Rulemaking (EPA-R03-OAR-2024-0513)
This summary is for informational purposes only. It may not capture all nuances of the regulation. Always refer to the official text for authoritative information.
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