The following are resources to assist NH Municipal Small Separate Storm Sewer System (MS4) communities with meeting the 2003 and 2017 EPA MS4 permit requirements.

NH MS4 Proposed Modifications:

May 4 and June 1, 2020 EPA Webinar Presentation slides on NH MS4 Proposed Modifications (Posted 5/4/2020)

Proposed Modifications to the 2017 New Hampshire Small MS4 General Permit (PDF) (136 pp, 4.3 MB) (Posted 5/4/2020)

Seacoast NOI Template and Guidance:

The documents below were produced collaboratively with the Seacoast Stormwater Coalition and Rockingham Planning Commission.  The materials are intended to assist with the preparation of the MS4 NOI for NH Communities.  Please note that some of the information is specific to the communities contained within the Seacoast Stormwater Coalition.

2019 Annual Report Templates and Guidance

NH Small MS4 Yearly Requirements

Part II: Summary of Receiving Waters

  • NH MS4 Permit Related Impairments Status Based on NH 2012 303(d) list in 2017 EPA MS4 Permit Based on NH 2012 303(d) list in 2017 EPA MS4 Permit. This is a spread sheet based on the information in the 2017 MS4 permit indicating what impairments each MS4 has. May be used for initial planning purposes for the Minimum Control Measure #1: Outreach and Education requirements related to impairments.  With the 2016 303(d) list partially approved by EPA, there may be some minor changes to this list to consider.

Part III: Stormwater Management Program Summary Minimum Controls

-Stormwater Management Program (SWMP)

– Minimum Control Measure 1: Public Outreach and Education

– Minimum Control Measure 2: Public Involvement and Participation

– Minimum Control Measure 3: Illicit Discharge and Elimination (IDDE)

– Minimum Control Measure 4: Construction Site Stormwater Runoff Control

– Minimum Control Measure 5: Post Construction Stormwater Management in New and Redevelopment

– Minimum Control Measure 6: Municipal Good Housekeeping and Pollution Prevention