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.
Check out our station QR codes to get the latest reading from your favorite access point.
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.
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Most Recent Test Results
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
Great news heading into the holiday weekend, with no rain in the forecast, we’re hopeful that E. coli levels will stay consistent with yesterday’s results at the river sites we tested, which were all below
Friends: This week’s testing results show the E. coli levels at all monitored sites, except one, were below the EPA’s recommended “do not exceed” threshold of 235 CFU per 100mL of water sample. As in
The E. coli levels at all the River sites and Manassas Run (FW36, Warren County VA) tested were below the EPA’s recommended “do not exceed” threshold of 235 CFU of E. coli bacteria per 100mL
In addition to lower water levels, mostly clearer conditions, and cooler temperatures this week, we observed a significant change in the E. coli level at our Hawksbill Creek site near the Luray-Hawksbill Greenway Pocket Park.