At one of the sites that we collected water samples at yesterday, Wednesday July 07, 2021 the E. coli level exceeded the previous Virginia water-quality standard threshold of 235 E. coli colony forming units per 100 mL of water sample for primary recreational use.
FW36 – Manassas Run upstream of the confluence with main-stem Shenandoah River, just upstream of the public boat landing, 1,413.6 MPN of E. coli colony-forming units per 100 mL
FOSR 2021 Summer Quantitative E. coli Concentration Results through 07.07.2021