Retired Events and Activities


Creek Health Monitoring

In October 2000, Friends of Cabin John Creek began a six-year water quality monitoring program in which volunteers collected and analyzed stream samples from sites throughout the watershed.  Water quality monitoring data can be used to establish a baseline measurement of ecosystem health, identify and prioritize pollution problems, and gauge whether restoration efforts are successful.  At its peak, the program collected data four times annually at 10 sites with approximately 50 volunteers participating.  Most of the sampling and analysis was conducted using the Izaac Walton League’s Save Our Streams Benthic Macro Invertebrate (BMI) Protocol. Additional measurements included turbidity, pH, temperature, dissolved oxygen, vegetation, and erosion. Monitoring results were submitted to the Montgomery County Department of Environmental Protection (DEP), to supplement their monitoring program, and FoCJC also participated in the Maryland State Department of Natural Resources (DNR) Stream Waders monitoring program.


Monitoring sessions were held on one day during the first three full weekends of the month in May, July, and September,  and optionally in December-February.  Training sessions were once or twice a year for new monitors, but the knowledge can be picked up relatively easily during the sessions themselves.  Data collected by the monitoring program was used to evaluate the health of the creek and to determine whether the County's stormwater runoff control program was working.  Much of the adverse impacts on local streams comes from stormwater runoff.


Powerpoint Presentation on FOCJC Monitoring Program, presented by Roy Seidenstein at the October 27, 2007 Montgomery County Watershed Conference.


Creek Health Monitoring Data

2011-2015 Watershed Health

2000-2006 Monitoring Site Map

2003-2006 Water Quality Data

2000-2003 Monitoring Data Tables


For details, contact