A bird’s eye view of one of the many streams in PA, this one an unnamed tributary of the east branch of Codorus Creek near Winterstown in York County

Make A Lasting Impact for Clean Water & Healthy Communities

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Our Impact

We strive for clean streams and rivers flowing through resilient landscapes, cared for by the people who live, work, and play in the Chesapeake Bay watershed.

1 million+

Trees planted along local streams and rivers

$10 million

Worth of stormwater management practices installed

141

Farms in the Chesapeake Bay watershed supported

700

Community scientists learned how to monitor water quality

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Permeable Interlocking Concrete Paver (PICP) Training

February 10, 2026

Are you or members of your staff are interested in permeable pavers or becoming an installer for the RiverSmart program? Read More >

2026 Treelay – Save the Date

March 28, 2026

Help make a splash towards clean water and healthy communities by planting trees with the Alliance during Treelay! Read More >

Wild & Scenic Film Festival – MD

April 1, 2026

Save the date for the 2026 Wild & Scenic Film Festival in MD! Read More >

Two Alliance staff members smiling as they stand behind a table set up with Alliance logos and educational materials.

Wild & Scenic Film Festival – DC

April 8, 2026

Save the date for the 2026 Wild & Scenic Film Festival in DC! Read More >

Wild & Scenic Film Festival – PA

April 14, 2026

Save the date for the 2026 Wild & Scenic Film Festival in PA! Read More >

Find even more local events, volunteer opportunities, and job postings on the Chesapeake Network!

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Our Work

The Alliance brings together communities, companies, and conservationists to improve our lands and waters.

Forests

Agriculture

Green Infrastructure

Stewardship & Engagement

Latest Blogs

rows of young trees inside plastic tubes
Agriculture Uncovered: nature-based practices for farm and ecosystem resilience
Reduce Your Stormwater: Urban Trees
an aerial view of a coastal farm
Maryland Farms Receives “Living Shoreline”
two people paddle a canoe in front of a bridge
Dairy Farm Helps Clean Juniata County Waterways
two large buildings next to a residential neighborhood
Where the Cloud Meets the Coast
orange flowers and a person showing another what is growing in a garden
Baltimore Green Space Invests in Preserved Spaces in Baltimore City Communities
four people laugh while talking to each other
The Swansboro West Civic Association envisions a new green space for their community
rows of young trees inside plastic tubes
Agriculture Uncovered: nature-based practices for farm and ecosystem resilience
Reduce Your Stormwater: Urban Trees
an aerial view of a coastal farm
Maryland Farms Receives “Living Shoreline”
two people paddle a canoe in front of a bridge
Dairy Farm Helps Clean Juniata County Waterways
two large buildings next to a residential neighborhood
Where the Cloud Meets the Coast
orange flowers and a person showing another what is growing in a garden
Baltimore Green Space Invests in Preserved Spaces in Baltimore City Communities
four people laugh while talking to each other
The Swansboro West Civic Association envisions a new green space for their community

Make an impact.

For our forests. For our streams. For our future.

Donate Today

Photo courtesy of Chesapeake Bay Program