Welcome to Your Estuaries Partnership

The mission of Piscataqua Region Estuaries Partnership (PREP) is to protect and improve the water quality and overall health of the region’s two estuaries – Great Bay & Hampton-Seabrook. We monitor and research the region’s water ways, encourage all who live, work and play on the Seacoast to take actions to help protect and preserve the places we love, support development patterns that protect water quality, maintain open spaces and important habitat, and restore estuarine resources. Read more.

Science & Research: Testing Nutrient Concentration

PREP’s core work includes our science, research and monitoring programs. We fund and coordinate scientific research projects and long-term monitoring to answer questions about the health of the estuaries and how they are changing over time. Our triennial  State of Our Estuaries reports explain the status and trends of environmental conditions in the estuaries. PREP also maintains an extensive Publications Library of research reports.  Read More

Get Involved - Eelgrass

As the Community for Clean Water, PREP works to unite and encourage you, your friends and family to take simple steps to reduce water pollution caused by our every day actions. The power to make a difference lies in every one of us changing small behaviors so that all of us can continue to enjoy this fantastic place we call home. Read More

Partnership & Initiatives – Great Bay Cleanup

PREP is what it is because of strong partnerships and collaborations, the work of protecting and preserving our estuaries could not be successful without the tireless efforts and cooperation from many. A primary initiative of PREP is to conserve natural areas and restore ecosystems that support estuarine health. PREP ‘s guiding document is the Piscataqua Region 2010 Comprehensive Conservation and Management Plan which contains 82 action plans that provide a roadmap to protecting and restoring the Great Bay and Hampton-Seabrook estuaries.  Read More

Featured Stories

  • November 2017: State of Our Estuaries
    November 2017: State of Our Estuaries
    2018 State of Our Estuaries It has been over 18 months since PREP started planning and gearing up for the 2018 State of Our Estuaries report, and we are now counting down the last 30 days until we release the report at the upcoming State of Our Estuaries conference on Friday, December 8, 2017 at the Portsmouth Harbor Events Center,...
  • November 2017: Community Calendar
    November 2017: Community Calendar
    Here’s a listing of some fantastic partner organizations that have ongoing events, even in winter, please join in! Get out there and enjoy YOUR estuary!  CLICK HERE TO REGISTER   Volunteer & Citizen Science Opportunities Region Wide! The Stewardship Network Online Hub Connect Here   Looking for Coastal Research Volunteers for NH Sea Grant! The Coastal Research Volunteers Hub Connect Here...
  • November 2017: Watershed Watch
    November 2017: Watershed Watch
    Our Watershed Watch feature is dedicated to sharing our partners’ and others latest research and reports as well as local, regional and national news. SURVEY: Dover Climate Chapter Strafford Regional Planning Commission & University of New Hampshire Cooperative Extension Calling all Dover residents! The City of Dover is developing a new Master Plan Chapter focused on the impacts of climate...



PREP is part of the U.S. Environmental Protection Agency’s National Estuary Program, a joint program between local, state and federal agencies established under the Clean Water Act with the goal of protecting and enhancing nationally significant estuarine resources. PREP is supported in part by an EPA matching grant and is housed within the School of Marine Science and Ocean Engineering at the University of New Hampshire.