Colorado Parks and Wildlife has temporarily closed the swim beach at Sweizter Lake State Park because of unsafe levels of E. coli bacteria.

The beach was closed Thursday; it will reopen when the bacteria drop to a safe level. The level will drop naturally; nothing can be done to get it to decline. CPW staffers are testing the water daily.

The lake remains open to boating, water skiing, paddleboarding and fishing; only the swim beach is closed.

The lake, just south of Delta, is filled with agricultural runoff water. Such runoff can increase E. coli levels, as can concentrations of wildlife, primarily water fowl.

The Colorado Department of Public Health and Environment mandates the testing of water at public beaches. For more information about such watering, visit www.colorado.gov/pacific/cdphe/swim-beach-monitoring.

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