These are the E. coli results for the water samples that were collected yesterday, Wednesday, June 07, 2023. The sites located on the Main-stem, North Fork, and South Fork of the Shenandoah River had relatively low E. coli concentrations/levels. The E. Coli concentrations/levels in Manassas Run however were elevated. https://fosr.org/state-of-the-river/water-quality-reports/
- FW 36 – 325.5 MPN E. coli Manassas Run, upstream of the confluence with the Shenandoah River at Morgan Ford low water bridge in Warren County, VA
As a reference point, the FOSR uses the single sample concentration threshold of 235 E. coli colony-forming units per 100 mL of water sample for primary recreational use that was included in the Virginia water-quality standard prior to October 2019. Meaning that if a single freshwater grab sample had E. coli concentration/levels that exceed 235 CFU per 100mL of water sample then the water was considered unsafe for primary recreational use. These data represent a snapshot of the water quality on the date, time, and under the conditions that the water sample was collected.
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