New York’s Expanding Environmental Regulatory Framework: A 2026 Outlook

Highlights

• Monitoring plan deadlines under New York's mandatory greenhouse gas (GHG) reporting program (Part 253) begin September 1, 2026, with first emissions data reports due June 1, 2027. The New York State Department of Environmental Conservation's (NYSDEC) 2026 Regulatory Agenda signals additional rulemakings ahead, including a potential statewide GHG emissions reduction program.
• NYSDEC finalized significant updates to its environmental remediation regulations (Part 375), effective December 31, 2025. Additional Part 375 amendments are on the 2026 Regulatory Agenda, including new soil cleanup objectives for perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS) and lead.
• Proposed regulations integrating environmental justice and climate analysis into the State Environmental Quality Act process are in final rulemaking, with adoption expected to expand permitting timelines and litigation exposure.