Both Lake of the Ozarks State Park public beaches, Grand Glaize Beach, off Hwy 54 in Osage Beach, and Public Beach 1, at 403 Hwy 134 in Kaiser, are open and under no swimming advisories this week.

Both Lake of the Ozarks State Park public beaches, Grand Glaize Beach, off Hwy 54 in Osage Beach, and Public Beach 1, at 403 Hwy 134 in Kaiser, are open and under no swimming advisories this week.

Last week Public Beach 1 was open, but under a swimming advisory after testing high for bacteria likely attributed to runoff caused by heavy rains and storms over the Fourth of July weekend which can cause bacteria levels to spike.

The Missouri Department of Natural Resources tests all state park beaches on Mondays and post wrestles on Wednesday. The agency also posts signs notifying visitors that swimming is not recommended if the geometric mean of the weekly water quality sample results exceeds the equivalent of 190 E. coli colonies per 100 milliliters of water (190 mpn/100ml

This week, Public Beach 1 geomean score of 26.6 mpn/100ml while Grand Glaize Beach posted a geomean score of 8.1 mpn/100ml based on two separate test results.

Water samples are analyzed for E. coli, a common indicator species for bacteria. It is normal for E. coli and other bacteria to be found at naturally-occuring levels in ponds, streams, rivers, lakes and reservoirs. Elevated bacteria levels are frequently associated with heavy rains; however, there are a number of other sources that may contribute to elevated bacteria levels, which may pose a health risk, according to MDNR.

Cuivre River State Park, 678 State Rt 147, Troy -- OPEN.

Finger Lakes State Park, 1505 E. Peabody Rd, Columbia -- OPEN.

Harry S Truman State Park Campground Beach, 28761 State Park Rd, Warsaw -- OPEN.

Harry S Truman State Park Day Use Beach, 28761 State Park Rd, Warsaw -- OPEN.

Lake of the Ozarks State Park Grand Glaize Beach, off Hwy 54, Osage Beach -- OPEN.

Lake of the Ozarks State Park Public Beach 1, 403 Hwy 134, Kaiser -- OPEN.

Lake Wappapello State Park, Hwy 172, Williamsville -- OPEN.

Long Branch State Park, 28615 Visitor Center Rd, Macon -- OPEN.

Mark Twain State Park, 37352 Shrine Rd, Florida, Mo -- ADVISORY - Swimming is not recommended.

Pomme de Terre State Park Hermitage Beach, Hwy 64B, Pittsburg -- OPEN.

Pomme de Terre State Park Pittsburg Beach, Hwy 64B, Pittsburg -- OPEN.

St. Joe State Park Monsanto Lake Beach, 2800 Pimville Rd, Park Hills -- OPEN.

St. Joe State Park Pim Lake Beach, 2800 Pimville Rd, Park Hills -- OPEN.

Stockton State Park, 19100 S. Hwy 215, Dadeville -- OPEN.

Thousand Hills State Park, 20431 State Hwy. 157, Kirksville -- OPEN.

Trail of Tears State Park, 429 Moccasin Springs, Jackson  -- OPEN.

Wakonda State Park, 32836 State Park Rd, La Grange -- OPEN.

Watkins Woolen Mill State Park, 26600 Park Rd N, Lawson -- CLOSED - due to flooding.