Friends of the Shenandoah River continues our Summer E. coli Testing Program at public access locations on the main stem, South Fork, and North Fork of the Shenandoah River. Real-time monitoring results are made available on all digital devices to help you make an informed decision about getting on or in the water.
FOSR utilizes WaterWatch*, a comprehensive digital platform that supports data collection, management, and visualization. FOSR provides unrestricted access to our water-quality data. We ask that acknowledgment and credit be given when using and referring to these data.
The test results in the map below provide a snapshot of the E. coli bacteria concentrations at the designated sites on the date, time, and under the conditions that the water samples were collected.
* Learn more about The Downstream Project’s WaterWatch program here.
Most Recent Test Results
Wednesday 06.10.2026: Water levels in the Shenandoah River watershed continued to recede. Despite only sporadic rainfall across the region since the testing event last week, four specific monitoring locations exhibited a notable spike in E.
This Wednesday, June 3, 2026, water levels at all but one of our monitored sites had receded back to normal levels for this time of year. Notably, E. coli levels also decreased at every location.
After five days of rainfall, E. coli bacteria levels in the North Fork, South Fork, and Main-stem of the Shenandoah River have risen significantly since our tests on May 19. Out of 14 sites monitored
Friends of Shenandoah are proud to launch the 10th year of our KNOW BEFORE YOU GO! Summer E. coli Testing Program at public access sites along the North Fork, South Fork, and Main Stem of
As the summer of 2025 comes to a close, Friends of the Shenandoah River (FOSR) has completed its final E. coli monitoring event for the season. Of the 14 sites tested on Thursday, September 18,
Unfortunately, no, the E. coli level measured in the Shenandoah River at Lockes Landing public boat landing (site FC05) in Clarke County, VA was 248.1 MPN (most probable number) of colony-forming units per 100 mL