Williston officials say pet waste could be a reason why the Allen Brook shows high levels of E. coli after summer rain storms.
The town studied the water in the brook this summer.
Town Environmental Planner Carrie Deegan says the results are a bit of a puzzle.
The study found concentrations of E. coli below suburban subdivisions as well as below farms and beaver dams. The levels spiked after storm water washed downstream after storms.
She says the town hopes continued monitoring will provide more information.
Vermont Department of Environmental Conservation’s James Pease says pet waste is a huge source of E. coli.