Drinking-water wells in St. George, Park City and Genola are among 600 being tested by the Environmental Protection Agency nationwide in a check for pesticide contamination.

The tests are being conducted as part of a two-year well survey designed to determine the frequency of pesticide contamination. The survey will examine potential relationships between contaminated drinking water wells and patterns of pesticide use and groundwater vulnerability, according to Jim Dunn, EPA project manager.Results of the $9 million survey will assist EPA in regulating pesticides and targeting future monitoring requirements. The data will also help EPA identify chemicals for which maximum contaminant levels should be set as required by the Safe Drinking Water Act.

Dunn said the EPA has no preconception that pesticide contamination exists in any of the wells randomly selected for the survey.