Release of Draft Integrated Review Plan for the Secondary National Ambient Air Quality Standard for Oxides of Nitrogen and Oxides of Sulfur

The Environmental Protection Agency (EPA) is announcing the availability, for public review, the draft document titled Draft Integrated Review Plan for the Secondary National Ambient Air Quality Standard for Oxides of Nitrogen and Oxides of Sulfur (draft IRP). This document contains the plans for the review of the air quality criteria for oxides of nitrogen and oxides of sulfur and the secondary national ambient air quality standards (NAAQS) for oxides of nitrogen and oxides of sulfur (NOX/SOX). The secondary NOX/SOX NAAQS provide for the protection of public welfare from exposure to NOX and SOX in ambient air.