Wells are installed in Washtenaw County for a variety of reasons, including drinking water, monitoring groundwater contamination, irrigation, and geothermal service.
Check prior records and maps for helpful information about your property:
- MapWashtenaw - Parcel maps and property data are available using this online mapping tool. View this online tutorial to learn how to use MapWashtenaw to create site plans.
- OnBase - Previous site plans; well, septic, building inspection and soil erosion permits are available in this online database. For the best results, only enter the street number of the address and search. Then, scroll through the records to find the property records you need.
Drinking Water Testing
Water quality tests are available from our Environmental Health Division office, located at 705 N. Zeeb Road, Ann Arbor.Link to page
Drinking Water Wells
Learn about drinking water wells including homeowner information, well components, and maintenance tips.Link to page
Testing Your Well Water for Bacteria
Coliform bacteria are found in the environment and in the feces of humans and animals. Most coliform bacteria do not cause illness, but they can indicate that other disease-causing organisms are present in the water. Waterborne illness from these other organisms can cause nausea, vomiting, fever and diarrhea.Link to page
Well Disinfection (Chlorination)
If your well water has tested positive for coliform bacteria, you may want to disinfect (chlorinate) your well.Link to page
Type 2 Water Supplies & Revised Total Coliform
The Total Coliform Rule (TCR), a National Primary Drinking Water Regulation, sets both health goals and legal limits for the presence of total coliforms in drinking water. The TCR requires all public water systems, both Community (Type I) and Non-Community (Type II), to monitor for the presence of total coliform bacteria in the distribution system.Link to page
Search Well & Septic Records
The OnBase system allows you to search for well, septic, building inspection, and soil erosion records and permits for Washtenaw County.Link to page
Installing a Well in Washtenaw County
Information about requirements for drilling a new well in Washtenaw County.Link to page