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Decreasing Water Levels and Algal Blooms Pose Threats to Human Health

FOSR’s 2021 Summer E. coli Results through 07.28.2021

Yesterday, and for the past five weeks, the E. coli levels measured at site FW36, Manassas Run, upstream of the confluence with main-stem Shenandoah River at Morgan’s Ford, just upstream of the public boat landing, have 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.

07.28.2021 FW36 – Manassas Run 648.8 MPN of E. coli colony-forming units per 100 mL.

FOSR 2021 Summer Quantitative E. coli Concentration Results through 07.28.2021 [1]

[2]The very noticeable decreasing water levels and increasing algal blooms in the Shenandoah River watershed pose potential health threats to humans, pets, livestock, and wildlife.

VDH’s Prevention Tips for when Harmful Algal Blooms are present – 

https://www.vdh.virginia.gov/content/uploads/sites/178/2021/03/VDH-Cyanobacteria-Flyer4_16_21.pdf