TWIN LAKES, Iowa (AP) — The Iowa Department of Natural Resources is cautioning people about entering the water at North Twin Lake near Fort Dodge after a test showed extraordinarily high bacteria levels.
The Fort Dodge Messenger reports (http://bit.ly/10NJNfx ) the DNR says a May 20 sample taken at Treman Park showed 160,000 E. coli bacteria per 100 milliliters of water. State guidelines set a maximum E. coli level of 235 bacteria per 100 milliliters.
Jason McCurdy, of the DNR, says it’s the highest level he’s seen at a beach.
By Tuesday, the level had fallen to 1,200 at Treman. Levels were below the state maximum level at other spots along the lake.
Calhoun County Conservation director Keith Roos says the problem was probably due to agricultural runoff after heavy rain, but other causes were possible.
Information from: The Messenger, http://www.messengernews.net