Green Infrastructure

Green infrastructure collects stormwater from streets, sidewalks, and other hard surfaces before it can enter the sewer system or cause local flooding. By reducing the amount of stormwater that flows into the Sewer System, green infrastructure helps prevent Combined Sewer Overflows and improves the health of local waterways. We have successfully built thousands of green infrastructure installations across New York City.

View our Interactive Map of Green Infrastructure Projects. If you have a green roof project that you’d like to add to this map, fill in our Green Roof Inventory Survey.

Learn more about the Types of Green Infrastructure you might come across in New York City. If you would like to get in touch, please fill in the Green Infrastructure Contact Form.

2025 Annual Report

The Annual Report provides an update on the NYC Green Infrastructure Program including all of the achievements and advancements through 2025 and outlines what is in store for 2026.

Download the 2025 Green Infrastructure Annual Report and Public Presentation.

To view reports from previous years, visit the Document Portal and search for “Green Infrastructure.”

CSO Consent Order Submittals

• Download the 2023 CSO Consent Order Modification

2025 Milestone Certification

• Download the DEP 2025 Milestone Certification and the 2025 Milestone Certification Backup

2016 Green Infrastructure Performance Metrics Report

• Download the 2016 Green Infrastructure Performance Metrics Report and Appendices
• Download the DEC Approval of the GI Metrics Report and the DEC Approval of the Green Infrastructure Contingency Plan (7/5/2017)
• Download the DEC Comments on the GI Metrics Report and GI Contingency Plan (3/16/2017) and the DEP Response to DEC Comments on the GI Metrics Report and GI Contingency Plan