The Boulder Reservoir swim beach, 5565 N. 51st St., will be closed at least through 4 p.m. Friday, July 13, due to elevated levels of bacteria. The increased levels are believed to be the result of the significant rain runoff from rain earlier this week. Swimming was temporarily suspended at 4 p.m. today as a precaution after a routine water sampling test determined bacteria levels were elevated.

Water at the swim area was then re-sampled and test results are expected by Friday afternoon. The reservoir swim beach will re-open once bacteria levels are reduced.

A spike in bacterial levels is not uncommon in natural bodies of water after significant rain runoff.