Department of Natural Resources announces latest results at Prairie Lee Lake

For more information: 573-751-1010
Volume 37-319 For Immediate Release: Sept. 9, 2009

Jefferson City, Mo. – The latest preliminary results drawn from Prairie Lee Lake on Tuesday showed decreasing levels of E. coli bacteria according to the Missouri Department of Natural Resources. 

Preliminary results from Tuesday’s testing ranged from 9.6 colonies per 100 milliliters to 65.7 colonies per 100 milliliters.  The state standard for maximum acceptable levels of E. coli is 235 colonies per 100 milliliters of water for a single sample and 126 colonies per 100 milliliters of water for a geometric mean for a number of samples for bodies of water such as Prairie Lee Lake and Lake Jacomo.

The latest results continue to show that E. coli bacteria levels in Lake Jacomo are well within the acceptable range.  Preliminary results ranged from less than 1 colonies per 100 milliliters to 7.5 colonies per 100 milliliters.

To report an environmental emergency, including sewage overflows, please contact the Department of Natural Resources' spill line at 573-634-2436. For more information contact the Department at 800-361-4827 or 573-751-3443, or visit the department's Web page at