Friends of the Shenandoah River

E. coli Testing Results for July 22, 2026

Six Sites Exceed E. coli Threshold

July 23, 2026

KNOW BEFORE YOU GO!

The E. coli test results for water samples collected yesterday varied significantly across monitoring locations. Once again, elevated bacteria levels were widespread: every single county monitored (Clarke, Warren, Page, and Shenandoah) had at least one site exceeding the EPA’s recommended safety threshold for primary body-contact recreation of 235 CFU per 100 mL, for a total of six sites across all monitoring locations.

Notable Findings (Warren County, VA)

Manassas Run (Site FW36): Located above the confluence with the Main-stem of the Shenandoah River, this site measured >2,419.6 MPN/100 mL. This indicates bacterial concentrations exceeded the maximum detectable limit of the testing method.
Main-stem of the Shenandoah River at Morgan’s Ford PBL (Site FW35): Just downstream of the confluence with Manassas Run, E. coli levels were measured at 727.0 MPN/100 mL, well above the recreation threshold.

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E. Coli Test results for July 23, 2026

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

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