SEQR Regulations (Part 617)

6 NYCRR Part 617

The NYS DEC regulations implementing the State Environmental Quality Review Act (ECL Article 8). Part 617 sets the procedures every state and local agency must follow before approving, funding, or undertaking an action that may affect the environment: classifying actions as Type I (617.4), Type II (617.5), or Unlisted; designating a lead agency; determining significance using an Environmental Assessment Form; and, where significant adverse environmental impacts are found, preparing and acting on an Environmental Impact Statement. Most zoning amendments, special use permits, site plans, and subdivisions are subject to SEQR review under these rules. Most recently amended effective June 12, 2026 (adopted April 24, 2026) to add environmental-justice and climate considerations and revise the Type II action list.