New Hampshire’s coastal waters have significant ecological, commercial, cultural, and recreational values for the state and its citizens, but the coastal waters are showing signs of pollution and environmental decline. Recognizing that water issues cannot be solved without collaboration, the New Hampshire Legislature created the Southeast Watershed Alliance in 2009. The Alliance is a means for communities to address water pollution, water supply, wastewater and stormwater management, septic systems, land use, and conservation.
The Southeast Watershed Alliance encompasses all forty-two New Hampshire communities in the New Hampshire coastal watershed. The Alliance is committed to improving the waters through collaborative watershed studies, education, and project implementation.
|News & Events|
|The next SWA BOD meeting will be held on Wednesday, April 27, 2016, 3:00-5:00 PM) in the conference room at Hoyle, Tanner’s Portsmouth
office in the Pease International Tradeport.
The Final Great Bay Nutrients Peer Review Report is now available.
The Seacoast Coalition and NHDES have reached a settlement in the lawsuit over the establishment of nitrogen criteria for Great Bay. Read the settlement letter here.
SWA has sign templates available for bioretention systems, tree filters, and gravel wetlands. Inform citizens about these effective stormwater treatment systems. Contact SWA to customize your sponsors’ logos.
|Green Infrastructure Workshop #2
Rain Garden Design and Installation June 7, 2014 9:00 – noon, Installation Demonstration. May 14, 2014 6:30 – 8 p.m., Design Workshop.
Both events at the Hampton LibraryGreat Bay Coastal Watershed Symposium
May 30, 9 a.m.-3 p.m. Hugh Gregg Coastal Conservation Center, 89 Depot Road, Greenland, NH
|Green Infrastructure Workshop #3
Green Infrastructure to Improve Stormwater Management in Your Community May 27, 7-9 p.m., Sandown Town Hall, 32-0 Main Street
|Green Infrastructure Workshop #1
Adopting Stormwater Standards – Using Green Infrastructure to Improve Stormwater Management in Your Community May 13, 2014 4-6 p.m. Epping Town Hall, 157 Main Street
|Symposium on Watershed and Hydrodynamic Modeling of Great Bay
April 18, 8-noon, Great Bay Community College
The Southeast Watershed Alliance has prepared draft stormwater management standards to provide a consistent and effective level of stormwater management and protection of clean water within the NH coastal watershed. These model standards are under consideration by several communities and have already been adopted by the Town of Newfields.
This project provided assistance to communities to improve stormwater management through the expertise of engineering consultants, installation of demonstration stormwater treatment systems, and workshops and outreach to municipal employees, town officials, volunteers, and neighborhood residents.
This project improved stormwater management in selected communities. First, project leaders identified and mapped Locations appropriate for the installation of stormwater treatment systems. Results included engineering consultation and design, soil mix and planting recommendations, and installation oversight and training. Projects included bioretention systems, gravel wetlands, and a tree filters. These systems treat stormwater run-off on-site and reduce pollutants discharged to waterways. Communities also received a GIS-based pollutant loading map to identify locations for future stormwater treatment installations.