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Inland Wetlands & Watercourses

Director: Patricia M. P. Sesto
Telephone: (203) 622-7736
Fax: (203) 622-7764
Location: Town Hall, Second Floor
Office Hours: Mon.-Fri. 8:00 a.m.-3:30 p.m.
Counter Hours: Professional staff is available to answer questions Mon.-Fri. 8:00 a.m.-1:00 p.m. Appointments can be made at other times with individual professionals.

Greenwich Bag Ordinance: Effective Sept. 12th
Greenwich Bag Ordinance: Effective Sept. 12th
Greenwich is pleased to be the second town in Connecticut to reduce the impacts of plastic bags by prohibiting single-use plastic bags traditionally used at retail check out. This is an essential step towards protecting the town’s human, natural, and cultural resources from the many negative consequences of plastic bags. Visit our Bag Ordinance page...
Judge upholds Greenwich IWWA decision to reject apartment complex plan
Judge upholds Greenwich IWWA decision to reject apartment complex plan
On February 20th, in a 24-page decision, Judge Marshall Berger Jr. dismissed the appeal by Post Road Iron Works, Inc. (PRIW) of the Inland Wetlands and Watercourses Agency (IWWA) denial. ... Read more
The inland wetlands and watercourses of the State of Connecticut are an indispensable, irreplaceable, and fragile natural resource with which the citizens of the State have been endowed.

The wetlands and watercourses are an interrelated web of nature essential to:

  • An adequate supply of surface and underground water
  • Hydrological stability and control of flooding and erosion
  • Recharging and purification of groundwater
  • The existence of many forms of animal, aquatic and plant life

The preservation and protection of the wetlands and watercourses from random, unnecessary and unregulated uses, disturbance or destruction is in the public interest and is essential to the health, welfare and safety of the citizens of the state.

It is, therefore, the purpose of the Greenwich Inland Wetlands and Watercourses Agency to protect the citizens of the State of Connecticut and Town of Greenwich by making provision for the protection, preservation, maintenance and use of the inland wetlands and watercourses.

Forms Required for Review
If there are wetlands/watercourse areas or drainage systems on a property, all proposed activities must be reviewed by the Inland Wetlands Agency staff. See forms below for more information.


Department Information
· General Information
· Forms and Other Information
· IWWA Public Web Portal
· Town Hall Only: IWWA Public Web Portal
· IWWA Application # Index by Street
· Public Web Portal Tip Sheet                   
· Frequently Asked Questions
Agency Information
· Agency Members and Staff
· Meeting Schedule & Agendas
· Meeting Archive
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Town Hall - 101 Field Point Road, Greenwich, CT 06830. Phone: (203) 622-7700. Copyright © , Town of Greenwich. All rights reserved.