The Rock County Public Health Department contracts with the Wisconsin Department of Natural Resources to conduct water sampling, testing, and water system inspections at public wells categorized as “Transient Non-Community” (TNC) wells. These TNC wells are at locations throughout the county that have their own well and serve water to at least 25 people a day, for at least 6-months out of the year. The wells are often located in parks, convenience stores, churches, taverns and other businesses that are not on a municipal water system.

Well water system inspections and well water testing are conducted to ensure that the facilities are providing a safe water supply to the public. Approximately 150 wells are tested annually for bacteria and nitrates.

Health Effects:

  • Bacteria can cause flu-like symptoms such as nausea, vomiting, fever, and diarrhea.
  • High nitrate levels can cause “blue baby syndrome,” an oxygen deficiency in the baby’s blood. Children under 6 months of age or any female who is or may become pregnant should use an alternative drinking water source.