HARLAN COUNTY LAKE, Neb. -- Due to high E. Coli concentrations, officials at Harlan County Lake have closed the Gremlin Cove Beach. E. Coli levels are currently 365.4 colonies per 100 milliliters of water. Levels above 235 colonies per 100 milliliters of water can cause a safety concern. Officials with the Lower Republican Natural Resource District will retest the water weekly starting on July 7, 2025, at Harlan County Lake beaches, and results will be available at the Nebraska DEQ Beach Watch website. The beach will remain closed until levels fall below 235 colonies per 100 ml water.