From the Boulder Daily Camera (Erica Meltzer):
In a discussion of a new master plan for the Boulder Reservoir, council members expressed concern about maintaining water quality and preventing invasive species from entering the reservoir. Several council members asked what the city could do to pressure the managers of Six Mile Reservoir, which feeds into the Boulder Reservoir, to maintain water-quality standards similar to Boulder’s. The answer was not much, except exert regional pressure.
More water pollution coverage here.