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United States Environmental Protection Agency
Interstate Air Quality Rule
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Clean Air Rules of 2004

The actions described here are part of the suite of inter-related rules collectively known as the Clean Air Rules of 2004. These rules address ozone and fine particle pollution, nonroad diesel emissions, and power plant emissions of sulfur dioxide, nitrogen oxides and mercury.

In the January 30, 2004 Federal Register, EPA proposed new air rules for reducing emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), and mercury. EPA proposed the Interstate Air Quality Rule which focuses on states whose SO2 and NOx emissions are significantly contributing to fine particle and ozone pollution problems in other downwind states. The proposed Interstate Air Quality Rule would cover 29 states in the Eastern United States and the District of Columbia. In a separate but closely related action, EPA proposed the Utility Mercury Reductions Rule for controlling mercury emissions from power plants. Together, the Interstate Air Quality Rule proposal and mercury proposal create a multi-pollutant strategy to improve air quality throughout the U.S.

Where to find more information:

Basic Information - Summary of the proposed Interstate Air Quality Rule as well as a summary of the design of the program and the benefits it would provide.

Regulatory Actions - Links to proposed and final rules, fact sheets, and other rulemaking documents.

Technical Information - Technical support information and links to related information.

 

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