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

  • January 2018: Community Calendar
    January 2018: 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!   January 3, 1918 the Piscataqua River froze due to extended cold temperatures (Photo: Kittery Historical & Naval Museum) Volunteer & Citizen Science Opportunities Region Wide! Nature Groupie Hub Connect Here Looking for Coastal Research Volunteers for...
  • January 2018: Watershed Watch
    January 2018: 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. Stewardship Network: New England Gets a New Name! Nature Groupie On Tuesday, January 2, 2018 the Stewardship Network: New England announced they are changing their name to Nature Groupie! The name change is based on research and...
  • January 2018: Modernizing Exeter’s Wastewater Treatment Facility
    January 2018: Modernizing Exeter’s Wastewater Treatment Facility
    If you have driven on Route 101 west from Hampton, you may have noticed some big changes happening at the Exeter Wastewater Treatment Facility over the summer and fall. Responsible for properly treating wastewater before discharging into the Squamscott River – and ultimately the Great Bay Estuary – the Exeter Wastewater Treatment Facility is currently undergoing some major upgrades to...



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.