Cyanobacteria Update at Bennington Lake
November 11, 2021
WALLA WALLA—This week Walla Walla County Department of Community Health (DCH) collected the final cyanobacteria, otherwise known as blue-green algae, water sample from Bennington Lake. The King County Public Health Lab will not be taking any more cyanobacteria samples until next season.
The final collection showed microcystin levels were very low and anatoxin-a was not detected and has not been detected throughout the entire monitoring season. “Microcystin is at 0.4 ug/L, which is significantly lower than the WADOH and EPA recreational guidance level of 8 ug/L,” said DCH Environmental...