Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Standards - Response to Comments on 2024 Proposed Decision

Documents posted here, together with their associated  final decision notices present the responses of the EPA to significant public comments received on the proposed decisions.

• Responses to Additional Significant Comments on the 2024 Proposed Action on the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur and Particulate Matter (pdf) (329.77 KB, December 2024)