Grand Glaize Beach, which was closed last weekend due to high E. coli levels in testing, has reopened in time for weekend swimming. Public Beach number 1 in Miller County remains open.
Only two beaches in the Missouri State Park system remain closed. The day use beach at Harry S. Truman State Park in Benton County is closed due to high bacteria levels, while the beach at Mark Twain State Park in Monroe County is closed due to high waters.
The Missouri Department of Natural Resources closes beaches when single samples exceed the EPA recommended maximum of 235 E. coli colonies per 100 milliliters of water (235 mpn/100ml) or when the geometric mean -- a rolling average of sample data -- exceeds 126 E. coli colonies per 100 milliliters of water (126 mpn/100ml).