Release of Integrated Review Plan for the Primary National Ambient Air Quality Standard for Sulfur Dioxide

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The Environmental Protection Agency (EPA) is announcing the availability of a final document titled Integrated Review Plan for the Primary National Ambient Air Quality Standard for Sulfur Dioxide (IRP). This document contains the plans for the review of the air quality criteria for health for sulfur oxides and the primary national ambient air quality standard (NAAQS) for sulfur dioxide (SO 2 ). The primary SO 2 NAAQS provide for the protection of public health from exposure to sulfur oxides in ambient air.