The Department of Natural Resources (DNR) recommends that well water is tested anytime that you notice a change in how your water looks tastes or smells but at least once a year for bacteria and every 3-5 years for Nitrates.
Problems can include bacterial infestation, toxins, such as pesticides, and metals or radium.
Door County has historic, geologic and geographic features which puts us at risk for well water contamination.
Flooding results in an increased risk of contamination and may require temporary special water precautions and testing. The county health department has several tips about this.
You can collect your own samples and submit them for a variety of test options. Sampling kits are available around the county and are free, but the testing is charged according to which test profile you choose. Sometimes, groups sponsor special rates or even free well water testing.
Treatment for bacterial contamination requires disinfecting the well and your water system. Other contamination may require more extensive measure. All treatments should be done in consultation with water specialists.
Find more information and resources at the Wisconsin DNR
“Test your private well water annually”
and
Door County Public Health Department
Recently the University of Wisconsin-Oshkosh, through their ERIC lab has been studying Door County well water so keep your eye out for enrolling in these programs.