Boulder Reservoir beaches closed due to E.coli

BOULDER, Colo. - Boulder Reservoir's beaches have been closed after a test showed a heightened level of E.coli.

The beaches closed Thursday and will remain closed until the E. coli levels fall within a safe range, officials said on the Colorado Department of Public Health and Environment website.

The heightened E. Coli levels can be caused by waste from swimmers, pets and birds; runoff, malfunctioning septic systems and improperly disposed dirty diapers, the website explained.

In the past few years, swim beaches at Chatfield State Park and Boyd Lake State Park have been closed for high levels of E. coli.