MS4 Stormwater Program

Stormwater Management Plan
Stormwater Management Plan (SWMP) and MS4 Stormwater Program

On July 1, 2018, the Town of Newmarket officially became part of the United States Environmental Protection Agency (EPA) National Pollutant Discharge Elimination System program. This is a national program which is aimed at improving New Hampshire’s water quality, with improved stormwater management as well as an array of training and implementation tools to assist communities with implementation. Stormwater is the leading cause of impaired water quality in New Hampshire and carries a wide range of pollutants to our state’s waterways, including bacteria, viruses, toxic metals, and excessive nitrogen. (Source: EPA, May 10, 2018)

As part of the permit, the Town is required to implement a public education program based on stormwater issues of concern and provide opportunities to engage the public in the planning process. This web page is designed to provide information to the public about the program, including the General Permit for Stormwater Discharges from the Small Municipal Separate Storm Sewer systems, a map of the Newmarket’s MS4 area, the Town’s Notice of Intent (NOI), and the Stormwater Management Plan (SWMP), our annual reports, and program evaluations. Periodically the Town will be updating this webpage with new information as it becomes available. If you have questions about the program or wish to provide written comments, please feel free to contact Diane Hardy, Town Planner and SWMP Team Coordinator at

The 2017 NH Small MS4 General Permit for Newmarket can be found here:

Storm Water Management Program

EPA Developers Fact Sheet

Yard Waste Brochure

Dog Waste Slides

Green Grass and Clear Water

Construction Fact Sheet

Get Pumped

Small MS4 Year 2 Annual Report

MS 4 Notice of Intent (NOI)

Authorization to Discharge

Map of Newmarket's MS4 Designated Area

Map of Newmarket's Impaired Water Bodies

Legal Notice Public Information Meeting 6/26/2019

NOI Attachment A – Endangered Species Documentation

NOI Attachment B -  Historic Preservation Documentation

PowerPoint Presentation

Annual Report Form 2019 - Final

Transmittal Letter for Annual Report 2019