Measured E. coli concentrations in Limestone Branch Tributary 4 starting in February 2022. Between April and November 2022, the Virginia DEQ single sample recreational use threshold of 235 CFU is continuously exceeded at values up to 42 times the threshold.
Loudoun Wildlife is grateful to Friends of the Shenandoah River for providing the baseline E. coli data from February 2022 for this project.
VA SOS Multimetric Index Score of 0 to 7 indicates unacceptable ecological conditions (red), 8 indicates indeterminate ecological conditions (gray), 9 to 12 indicates acceptable ecological conditions (green).