Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Standards - Litigation Associated with Current Review

Litigation associated with the current NAAQS review may involve schedules for the review as well as challenges to the final decisions, and court decisions in these matters.  

• Joint Notice of Stipulation to Modify Consent Decree (extending proposed decision date) (pdf) (93.85 KB, Nov 7, 2023)
• Order Establishing Schedule for Proposed and Final Rulemaking Decisions - Oct 12, 2022 (PDF) (114.7 KB)
• Joint Motion to Enter Proposed Consent Decree - Sept 28, 2022 (PDF) (311.92 KB)
• Proposed Consent Decree (pdf) (149 KB)

You may also be interested in other documents from the current nitrogen dioxide and sulfur dioxide secondary standards NAAQS review.