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Stormwater Regulations

The City of Manchester is focused on managing its stormwater. Stormwater discharges in the City of Manchester are regulated by the U.S. Environmental Protection Agency (EPA) National Pollutant Discharge Elimination System (NPDES) Phase II Stormwater Permit Program. Under this program, Manchester was required to obtain NPDES permit coverage under the 2003 and 2017 General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems (MS4s)" for its stormwater discharges. . This permit program was created with the intention of improving the quality of the nation’s waterways by reducing the quantity of pollutants that stormwater picks up and carries into stormwater systems and discharges to surface waters. 

 Under this permit, Manchester was required to develop and implement an ordinance, by-law, or regulatory mechanism to address stormwater discharges. The Board of Mayor and Aldermen originally approved the Stormwater Ordinance on August 1, 2006. The purpose of this Stormwater Ordinance and supporting Regulations is to protect, maintain, and enhance the environment of the City of Manchester and the public health, safety, and general welfare of its citizens by controlling discharges of pollutants to the City’s stormwater system.

Adopted Stormwater Ordinance

To comply with the 2017 MS4 Permit, Manchester was required to update its Stormwater Ordinance and Regulations, primarily to incorporate pollutant removal and design criteria required under the permit. To help streamline the permitting and review process related to construction and development/redevelopment projects, Manchester provided updates to its Subdivision and Site Plan Review Regulations, Stormwater Ordinance and Regulations, and Standard Specifications for Road, Drain & Sewer Construction.

Adopted Stormwater Regulations

Standard Specifications for Road, Drain & Sewer Construction

Subdivision and Site Plan Review Regulations, Stormwater Ordinance and Regulations

Most permit applications will go through the Subdivision and Site Plan Review permitting process. However, a separate Land Disturbance Permit application through DPW-EPD will be required for any project that disturbs >0.5 acres of land or >1,000 square feet on slopes >15% that is not subject to Subdivision and Site Plan Review. In any case, the Land Disturbance Permit application form and checklist must be submitted with the application package and all projects must meet the requirements of the Standard Specifications, unless a waiver is requested.

Land Disturbance Permit Application (June 30, 2021)

Land Disturbance Permit Checklist (June 30, 2021)

City of Manchester Steep Slope Map with Parcels

As part of the recent MS4 permit requirements, the City of Manchester completed a review and evaluation of the Stormwater Regulations. The results of this review are included in the Stormwater Management Program (SWMP) document and can be viewed by clicking on the following link:

Stormwater Regulation Review 


If you have any stormwater-related issues or questions, please contact the EPD Stormwater Department at (603) 624-6527 or email us by clicking on the link below:
Email the Stormwater Department