Shack Forms Module 181
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(Storm Water Discharge) 

Norwell MS4 MapNPDES Phase II Small MS4 General Permit Effective July 1, 2018 

EPA Authorization to Discharge 2019

Town Of Norwell MS4 Overview Map (12mb PDF, updated Nov 13, 2019)

MS4 Year 1 Annual Report (1.7mb PDF: Reporting Period of May 1, 2018-June 30, 2019)

Stormwater Management Program (SWMP): Volume 1

11 Mb, 70 pages PDF.

Stormwater Management Program (SWMP): Volume 2
9 Mb, 119 pages PDF.

The Highway Department manages the Town’s storm drainage system, also known as a Municipal Separate Storm Sewer System (MS4). The Town is authorized to discharge stormwater through the Phase II National Pollutant Discharge Elimination System (NPDES) General Permit for Stormwater Discharges from Small MS4s in Massachusetts. The U.S. Environmental Protection Agency (EPA) oversees the NPDES program. Each Community with an MS4 in designated urbanized areas must develop a Stormwater Management Program (SWMP) that will guide its activities under the 2016 MS4 general permit. These documents are available for review by clicking on the links above. Questions and comments on the plan can be made through the "MS4 Questions or Comments?" form on this page to the right.

Archived Reports

Stormwater Management Program (SWMP):
Volume 3 NPDES Phase II Small MS4 General Permit
June 2020 

NPDES PII Small MS4 General Permit Annual Report
April 1, 2017-March 31, 2018 

NPDES PII Small MS4 General Permit Annual Report 
April 1, 2016-March 31, 2017

2016 Final Permit Documents (Statewide)

The 2016 Massachusetts Small MS4 General Permit was signed April 4, 2016 and became effective July 1, 2017. The final permit reflects modifications to the 2014 draft small MS4 general permit released for comment on September 30, 2014 and replaces the 2003 small MS4 general permit for MS4 operators within the Commonwealth of Massachusetts. The permit, appendices, and response to comment documents are available below.