DES MOINES, Iowa [KCCI]— The Iowa DNR suggests avoiding 10 beaches this weekend where E. coli levels are too high.

Swimming is not recommended at the following beaches:

• Backbone Beach
• Beeds Lake Beach
• Black Hawk Beach
• Blue Lake Beach
• Bobwhite State Park
• Lake Darling Beach
• Nine Eagles Beach
• North Twin Lake West Beach
• Pine Lake South Beach
• Union Grove Beach

All 10 beaches exceeded the standard for E. coli levels in recent testing. This can indicate higher levels of different viruses and bacteria. The DNR conducts weekly tests at more than three dozen state-owned swimming beaches between the week before Memorial Day through Labor Day.

Another beach, George Wyth Beach in Black Hawk County, is closed due to flooding.