Pine Lake State Park in Eldora is now 1 of 10 in the state where swimming is not recommended. Depart of Natural Resources Tesgin has discovered E-Coli. The DNR is conducting extra testing at Pink Lake to determine what’s causing the contamination & how to deal with it. The extra testing is taking place at State Parks across the state. One state park beach in Southwest Iowa is closed outright due to the discovery of a rare amoeba that can cause death.