Release of Draft Integrated Science Assessment To Support the Review of the Primary National Ambient Air Quality Standards for Oxides of Nitrogen

Resumen

The U.S. Environmental Protection Agency (EPA) is making available for public review the draft document titled, Integrated Science Assessment for Oxides of Nitrogen--Health Criteria, External Review Draft ("draft ISA"). This document was prepared as part of the current review of the primary (health-based) national ambient air quality standards (NAAQS) for oxides of nitrogen. The draft ISA will be available on or about July 15, 2026.