Baltimore Harbor Waterkeeper

The Baltimore Harbor Waterkeeper uses science and the law to hold polluters accountable and to ensure that the government is upholding the Clean Water Act. We focus on protecting and restoring the tidal and nontidal waterways that flow into the Baltimore Harbor and the Patapsco River.  We advocate for stronger enforcement of our laws for clean water, both locally in the Baltimore area and statewide. Working hand in hand with our local community we amplify the voice of the people who are directly impacted by the top pollutants plaguing our City: trash, contaminated stormwater runoff, sewage overflows, and toxics.

Water Quality Monitoring

Baltimore’s waterways are a living resource, teeming with life and ecological importance.  Blue Water Baltimore recognizes the biological, recreational, economic, social, and spiritual benefits of our waterways.  We are committed to keeping a pulse on our waterways by routinely collecting and analyzing local water quality data for our neighborhood streams, rivers, and Harbor.  We use that data to advocate for better enforcement and compliance with water pollution laws, and to communicate with the public about the pollutants that degrade water health.

The Baltimore Harbor Waterkeeper regularly collects data at 49 stations in the Gwynns Falls, Jones Falls, and tidal Patapsco River.  Baltimore Water Watch is our online mapping platform where you can see our most recent readings as well as an annual assessment of water health.

Get Involved

We need your help to keep an eye on our waterways and to be a voice for your community.


Photo by Damon Meledones
The Baltimore Harbor Waterkeeper and scientists at Blue Water Baltimore collect water quality data at 49 stations throughout Baltimore’s waterways. Photo by Damon Meledones.


Protecting Our Waterways

Blue Water Baltimore, home of the Baltimore Harbor Waterkeeper, is a member of the international Waterkeeper Alliance and Waterkeepers Chesapeake.

14-1622B - Member Agency