10,000 Friends of Pennsylvania is the leading statewide voice for great places to live and work. The organization works with citizens, organizations and public officials to create land use, infrastructure and governance policies and practices that protect resources and strengthen the economy. 

The Alliance for the Chesapeake Bay is a regional nonprofit organization that builds and fosters partnerships to protect and to restore the Bay and its rivers. The Alliance does not lobby or litigate. Instead, it works toward bridging dialogue between groups that don't see eye-to-eye, forming strategies for joint solutions and building the capacity of communities for local-level action. 

Located on the heavily polluted Anacostia River in Southeast Washington, DC, the goal of the Anacostia Riverkeeper is to protect and restore water quality in the Anacostia River and its tributaries through community action and enforcement; to encourage responsible use of public and private land to create a thriving Anacostia River; to offer and provide professional advice and research about the state and health of the river. 

Arlingtonians for a Clean Environment is a resource for public education about the local environment and for volunteer involvement in environmental improvement efforts. 

The Audubon Naturalist Society is the largest and oldest independent environmental organization in the Washington, DC region and is a pioneer in linking conservation activities with environmental education 

Baltimore Harbor Watershed Association is a 501(c)3 organization representing individuals, businesses, government agencies and nonprofit organizations with an interest in promoting and helping to establish a better quality of life in and around the Harbor. 

The Buffalo Creek Watershed Alliance is a nonprofit organization whose members include individuals and organizations that care about maintaining and improving the resources of the Buffalo Creek Watershed, 

Since 1992, the Center for Watershed Protection has been working in numerous communities to provide the solutions for clean water and healthy natural resources. The work is based on scientific research and guided by a passion for advancing the state-of-the art, ensuring practitioners have the right tools, and promoting the widespread implementation of the most effective watershed management techniques. 

The Wildfowl Trust of North America, Inc., was founded in 1979 as a direct response to the dwindling waterfowl population of the Chesapeake Bay. In 2002 the Horsehead Wetlands Center was renamed and became the Chesapeake Bay Environmental Center. The mission of the Wildfowl Trust of North America and its physical site, the Chesapeake Bay Environmental Center, is to promote stewardship and sustainability through environmental education and habitat restoration. 

The Chesapeake Ecology Center is dedicated to promoting and educating the public about community greening and conservation landscaping practices for the Chesapeake Bay watershed that result in a healthier and more beautiful environment benefiting residents and the region's biological diversity. It is a 501(c)(3) nonprofit environmental organization. 

The Chesapeake Stormwater Network advocates for reform of federal, state and local laws, permits, regulations and design manuals to promote more sustainable stormwater management in the Chesapeake Bay. The interactive network aligns and integrates the efforts of thousands of individuals working on the stormwater problem across the Bay. 

CRA strives to promote stewardship of the Chester River - its forests, marshes, fields, creeks, and streams - as well as an understanding of the river's place in the economic and cultural life of our communities. 

The Coalition’s mission is to ensure that transportation and development decisions accommodate growth while revitalizing communities, providing more housing and travel choices and conserving natural and historic areas. 

The Earth Conservation Corps is a nonprofit youth development and environmental service organization located where the heavily polluted Anacostia River flows through the nation’s capital’s most disadvantaged communities. Since 1992 it has been successfully reclaiming two of America’s most endangered resources—youth and the environment 

Environment Maryland is a citizen-based environmental advocacy organization that works on behalf of its members. Its core mission is simple: to protect Maryland's clean air, clean water, and open space. In practice, the staff combines independent research, practical ideas and tough-minded advocacy to preserve the state's wild places and natural beauty, protect Marylanders from toxic pollution, reduce material consumption, build sustainable transportation and communities, and shift to 100% clean energy 

ASNV connects people, earth and sky. Through the education programs, ASNV helps members and the community understand, appreciate and enjoy birds and other wildlife, their habitats and their link to peo 

The Institute’s work engages leaders and groups and allows them to develop a shared understanding of where they are at now and where they might go to be even more effective.  

Founded in 1922, the Izaak Walton League is one of the nation's oldest conservation organizations. With a powerful grassroots network of nearly 270 local chapters nationwide, the League takes a common-sense approach toward protecting the country's natural heritage and improving outdoor recreation opportunities for all Americans. 

The Jones Falls Watershed Association is a volunteer-driven grassroots organization started in 1997 to protect and restore the Jones Falls and its tributaries. The organization is credited with bringing attention to the river and building awareness of the stream and stream valley as natural resource assets for the community. 

The Lower Susquehanna Riverkeeper is an alliance builder, diplomat, educator, advocate and a voice of the Susquehanna and the Chesapeake Bay. 

The Maryland Conservation Council brings together organizations throughout the state to create a strong voice for the environment and to coordinate effective action by citizens with knowledge, expertise and energy. 

MWS is a 501(c)3 Charles County, Maryland-based organization committed to protecting Mattawoman Creek and the surrounding watershed. 

The sole purpose of the Patuxent Riverkeeper is to protect, restore and advocate for clean water in the Patuxent River and its connected ecosystem. The waterkeeper patrols the river, investigates and resolves water quality and pollution complaints, launches and manages restoration projects, raises awareness about the river and its problems and works toward better enforcement of current laws and better laws to protect the river. 

Founded in 1992, PASA's vision has been to transform agriculture and food systems in Pennsylvania and beyond in a way that makes farmers more viable, improves the land and restores the health and wellbeing of all citizens. 

The Pennsylvania Organization for Watersheds & Rivers is a tax-exempt, 501 (c) (3), nonprofit corporation with a mission to protect Pennsylvania’s watersheds both through direct work and support of other organizations with similar missions. 

Since 1892, the Sierra Club has been working to protect communities, wild places and the planet itself. It is the oldest, largest and most influential grassroots environmental organization in the United States. Founder John Muir appears on the back of the California quarter. 

Waterkeeper Alliance is a global movement of on-the-water advocates who patrol and protect more than 100,000 miles of rivers, streams and coastlines in North and South America, Europe, Australia, Asia and Africa. Waterkeeper Alliance provides a way for communities to stand up for their right to clean water and for the wise and equitable use of water resources, both locally and globally. The vision of the Waterkeeper movement is for fishable, swimmable and drinkable waterways worldwid 

West/Rhode Riverkeeper, Inc., was founded in 2005 by Bob Gallagher, a former attorney living in Shady Side. Along with the members of the Advisory Board, Bob built an organization to support the mission of stopping pollution, enforcing environmental law, promoting restoration and advocating for better environmental policy.