With heavy precipitation events happening more frequently, flooding is an increasing concern across Michigan. After flooding events, it’s essential to ensure your drinking water is safe—especially if you rely on a private well. Unlike public water systems, private well owners are responsible for monitoring and maintaining their own water quality. Floodwaters can introduce harmful contaminants into your well, including sewage, chemicals, and bacteria.
What you should do after flooding:
Avoid using well water for drinking, cooking, or brushing teeth.
Use bottled or boiled water until your supply is confirmed safe.
Contact your local health department to arrange water testing.
The Luce Mackinac Alger Schoolcraft (LMAS) Regional Water Laboratory is here to help protect your health by offering reliable, local water testing services. Our laboratory provides testing for E. coli bacteria, nitrates, and nitrites.
For your convenience, please check the LMAS website listed below for current courier days and times for sample drop-off and transport.
Testing your well water after a flood is a simple but critical step to ensure your household’s safety.
To reach our Environmental Lab, call 906-293-5107 ext. 314. You can also email us at lab@lmasdhd.org. For more information, visit www.lmasdhd.org/laboratory-testing.









