Welcome to the NH Stormwater Regional Coalitions’ MS4 Website

The New Hampshire Stormwater Regional Coalitions’ MS4 website is a resource for the New Hampshire Lower Merrimack Valley Stormwater Coalition and Seacoast Stormwater Coalition permittees (municipalities and non-traditionals). This site contains meeting information, resources and updates related to New Hampshire MS4 (Municipal Separate Storm Sewer Systems) permittees.