• September 23 - Draft Investigation Plan - American Two Cleaners Site (Suffern) Comment Deadline
  • September 23 - Five Rivers: Citizen Science: Early Birds
  • September 23 - Five Rivers: Citizen Community Science: Monarch Larva Monitoring Project (MLMP)
  • September 23 - Five Rivers: Citizen Science: Monarch Larva Monitoring
  • September 23 - NYSDEC Pop-up Fishing Clinic - Central Park
  • September 24 - Brownfield App. - Clocktower Site (Roslyn) Comment Deadline
  • September 24 - Proposed Cleanup - EJ Victory Building Site (Johnson City) Comment Deadline
  • September 25 - Free Fishing Day in New York State
  • September 25 - Five Rivers: The Nature Bus Connects You with Five Rivers
  • September 25 - Five Rivers: How to do it: Learn to Fish
  • September 25 - Reinstein Woods - Outdoor Skills
  • September 25 - Second Annual Long Island Women’s Fishing Expo at Connetquot River State Park
  • September 29 - Public Availability Session - Elmira High School Cleanup (Elmira)
  • September 30 - Proposed Cleanup - 250 Water Street Site (Manhattan) Comment Deadline Extended
  • September 30 - Five Rivers: Outdoors After School
  • September 30 - NYSDEC Pop-up Fishing Clinic - Kissena Park
  • October 1 - Soil science and management in urban forestry