(Brookville, IN)--Brookville Lake’s beaches will be open for the Labor Day weekend. Mounds and Quakertown beaches were closed earlier this week after high levels of E. coli were found during routine water testing. A second test showed that levels have dropped. DNR officials blamed high temperatures, no rain, and a lot of goose poop for the E. coli. The lake’s blue/green algae alert remains in effect.