Gunpowder Riverkeeper

Gunpowder Riverkeeper Gunpowder RIVERKEEPER® values the biological, recreational and economic aspects of the river.

Gunpowder RIVERKEEPER® is a grassroots, advocacy based, non-profit, tax-exempt 501 (c) ) (3) membership organization charged with protecting, conserving and restoring the Gunpowder, Bird, Bush, and Middle Rivers and their watersheds for all users. Gunpowder RIVERKEEPER®, is the 18th WATERKEEPER® program in the Chesapeake region and takes responsibility for protecting and conserving the Gunpowder r

iver and its watershed for the benefit of the public. As a member of the WATERKEEPER ALLIANCE® we take a proactive role in safeguarding the river from threats to the health and stability of the watershed by conducting scientific monitoring of the river to ensure that it is being properly regulated by the county, state and federal entities charged with enforcing Clean water act regulations. That’s why we’re committed to independent water quality testing for bacteria and other harmful pollutants in the watershed. We champion enforcement and compliance of environmental laws within the watershed to protect and conserve the river for all users. Our project areas include:
Monitoring industrial activities
Stormwater runoff compliance
Invasive species containment/outreach
Agricultural runoff compliance
Lawn fertilizer nutrient loading/outreach
Sewage overflow compliance
Monitoring and Mapping the River and its Watershed

Four out of the five locations along the Gunpowder River and Little Gunpowder Falls tested below 235 MPN (Maximal Probab...
06/04/2026

Four out of the five locations along the Gunpowder River and Little Gunpowder Falls tested below 235 MPN (Maximal Probable Number) in a single-grab sample, in dry conditions, on Tuesday, June 2.
https://gunpowderriverkeeper.org/gunpowder-river-water-quality-update-june-2-2026/
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Please note safe swim guidance from MDE is to refrain from entering waters of the State within 48 hours of a 1" rainfall event so be sure to check rainfall amounts before going for a swim.
We test for E.Coli levels at five locations across the basin. Our results are a snapshot of water conditions at the time the sample was taken. We do not currently monitor other health risks such as: Harmful algal blooms, Vibrio, or Pfiesteria.

Curious about our bacterial monitoring data? Check out our blogpost about the causes of high bacterial levels in the Gun...
06/03/2026

Curious about our bacterial monitoring data? Check out our blogpost about the causes of high bacterial levels in the Gunpowder Watershed and for what you can do to help protect the environment and yourself when recreating on the water:

Memorial Day through Labor Day, Gunpowder RIVERKEEPER® conducts weekly bacterial water quality monitoring to inform river users of conditions that are more likely to result in bacterial infection. These conditions usually occur after periods of heavy rainfall as the stormwater runoff carries surfac...

Thanks to Maryland Matters Christine Condon for her great coverage of our settlement outcome. We're excited about meanin...
05/30/2026

Thanks to Maryland Matters Christine Condon for her great coverage of our settlement outcome. We're excited about meaningful next steps in the restoration of Gunpowder River tidal basin.

Maryland inked a $4.1 million settlement deal with the developer, homebuilder and contractor of a Harford County home development blamed for damaging releases of sediment into the Gunpowder River, the attorney general’s office announced Tuesday.

Four out of the five locations along the Gunpowder River and Little Gunpowder Falls tested above 235 MPN (Maximal Probab...
05/27/2026

Four out of the five locations along the Gunpowder River and Little Gunpowder Falls tested above 235 MPN (Maximal Probable Number) in a single-grab sample, in wet conditions, on Tuesday, May 26.
https://gunpowderriverkeeper.org/gunpowder-river-water-quality-update-may-26-2026/

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Please note safe swim guidance from MDE is to refrain from entering waters of the State within 48 hours of a 1" rainfall event so be sure to check rainfall amounts before going for a swim.
We test for E.Coli levels at five locations across the basin. Our results are a snapshot of water conditions at the time the sample was taken. We do not currently monitor other health risks such as: Harmful algal blooms, Vibrio, Pfiesteria.

For Immediate Release: Ridgely's Reserve Lawsuit Settled! Check out our blogpost for the full press release: https://gun...
05/19/2026

For Immediate Release: Ridgely's Reserve Lawsuit Settled! Check out our blogpost for the full press release: https://gunpowderriverkeeper.org/mde-lawsuit-against-ridgelys-reserve-housing-development-settled-for-4-1-million-with-gunpowder-riverkeeper-as-intervenor-and-nets-2-million-civil-penalty-2-1-million-for-community-driven

Foster's Branch sediment plume at Amtrak line in tidal Gunpowder River. Joppa, Maryland. – Today, Gunpowder Riverkeeper in conjunction with the Maryland Department of the Environment (“MDE”) announced a $4.1 million settlement to resolve a lawsuit, instigated by Gunpowder Riverkeeper, against ...

05/16/2026

Action Alert: Tell the Coast Guard how you boat under the Amtrak Bridges over the Gunpowder and Bush Rivers. Submit your comment by June 11th to ensure your voice is heard before the construction commences: https://gunpowderriverkeeper.org/action-alert-do-you-navigate-the-gunpowder-and-bush-rivers-under-the-amtrak-bridges-submit-your-comment-to-the-u-s-coast-guard-by-june-11th/

Gunpowder RIVERKEEPER® is a grassroots, advocacy based, non-profit, tax-exempt 501 (c) ) (3) membership organization charged with protecting, conserving and restoring the Gunpowder, Bird, Bush, and Middle Rivers and their watersheds for all users.

Address

Sparks Nature Center, 1207 Sparks Road
Sparks, MD
21152

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