From the Fort Collins Coloradoan (Bobby Magill):

The city of Fort Collins is planning to mix Poudre River water into the city water supply later this month, most likely after a rush of silty water moves downstream and out of Poudre Canyon.

Fort Collins gets its drinking water from both the Poudre River and Horsetooth Reservoir, the water for which is pumped beneath Rocky Mountain National Park from the Colorado River.

Ash, silt and debris washing off the Hewlett and High Park fire burn areas prompted the city to stop taking water from the Poudre River in early June, and no Poudre water has been used since then because of poor water quality.

More Cache la Poudre River watershed coverage here and here.