Friends of the Shenandoah River

E. coli Testing Results for September 02, 2025

Did the Streak Continue For a Fourth Consecutive E. coli Testing Event?
Seeing the river through curious eyes, inspiring the next generation of river stewards

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 of water. This exceeds the EPA’s recommended Beach Action Value (BAV) threshold for freshwater recreation, which is 235 CFU/100 mL.

However, there is good news. All other monitored sites, including Manassas Run and Hawksbill Creek, tested below the EPA’s BAV threshold.

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E. Coli Test results for September 3, 2025

These results 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.

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Test Results Archive

These are the E. coli results for the water samples collected on Wednesday June 05, 2024 as part of Friends of the Shenandoah River (FOSR) Summer E. coli Testing Program at public access locations on

These are the E. coli results for the water samples collected on Thursday May 30, 2024 as part of Friends of the Shenandoah River (FOSR) Summer E. coli Testing Program at public access locations on

Friends of the Shenandoah River (FOSR) launched our Summer E. coli Testing Program at public access locations on the Main-stem, South Fork, and North Fork of the Shenandoah River yesterday, Tuesday May 21, 2024. We