Environmental Monitoring

Overview: Because of the economic, biological and recreational importance of the River, there exists a pressing need for independent, comprehensive baseline environmental monitoring and mapping of the river and its watershed. Parameters such as temperature, pH, dissolved solids, Chlorophyll A, Nitrogen, Phosphorous and bacteria will be collected throughout the watershed. This data will be visualized with GIS mapping and shared with regulatory agencies.

Project: In-stream monitoring work will take place at sites of concern along the river and its watershed to determine water quality impacts.

Benefits: This information may be used to assess and report on the river’s relative biological health, potential watershed impacts and monitoring industrial, commercial and recreational impacts along the watershed. This data set will be used to direct county and state agencies to factor existing impacts into TMDL, (Total Maximum Daily Load) recommendations throughout the watershed.


Interested in doing your part to protect your river?
Become a Gunpowder Champion by joining, donating or volunteering today.
Volunteer and internship opportunities await!

/ Monitoring, Outreach, Take Action, Water
Gunpowder RIVERKEEPER® Middle River Pilot Monitoring Program: Monitoring Location Access Needed!

Gunpowder RIVERKEEPER® Middle River Pilot Monitoring Program: Monitoring Location Access Needed!

We've heard the questions: Where is the Middle River monitoring data? Why aren't you monitoring Middle River? Since we've been ...
/ Monitoring, Outreach, Water
Wader Wash Station Volunteer Training to be held November 7, 2026

Wader Wash Station Volunteer Training to be held November 7, 2026

Pictured: the wader wash station at Masemore Road Join us between 10am and 1pm on Saturday November 7th 2026 to ...
/ Monitoring, Outreach, Water
Join Gunpowder RIVERKEEPER® for Benthic Macro Invertebrate Monitoring: October 10th and 17th

Join Gunpowder RIVERKEEPER® for Benthic Macro Invertebrate Monitoring: October 10th and 17th

Gunpowder RIVERKEEPER® will be putting our skills into practice to measure stream health with Izaak Walton League's Save Our Streams ...
/ Education, Monitoring, Outreach
Gunpowder RIVERKEEPER® Hosts SAV Training in collaboration with MDNR at Hammerman State Park

Gunpowder RIVERKEEPER® Hosts SAV Training in collaboration with MDNR at Hammerman State Park

On Saturday September 19th, 2026 Gunpowder RIVERKEEPER® 's Theaux Le Gardeur and Department of Service and Civic Innovation 2nd Year ...
/ Monitoring, News, Water
Gunpowder RIVERKEEPER® Receives Official Tier-3 Water Quality Monitoring Designation

Gunpowder RIVERKEEPER® Receives Official Tier-3 Water Quality Monitoring Designation

On Tuesday July 21st, Gunpowder RIVERKEEPER® staff: Theaux Le Gardeur, Brady Bayne, and Skidmore College intern Luke Kretschman were joined ...
/ Bacterial Monitoring, Monitoring, Water
Gunpowder River Water Quality Update: September 1, 2026

Gunpowder River Water Quality Update: September 1, 2026

Gunpowder RIVERKEEPER® is proud to provide weekly water quality information to residents of Baltimore and Harford counties along the Gunpowder ...
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