The Iowa Department of Natural Resources says the water concentration of E. Coli on Crandall’s Beach on Big Spirit Lake has surpassed the capabilities of DNR test kits. The beach registered more than 24,000 viable bacteria. This is 10 times what is considered unhealthy. Rapid bacteria growth may  be due to recent summer temps or runoff from heavy rainfall washing animal manure into the lake. Iowa DNR indicated that the water will be tested again on Wednesday, August 24th.