Keep your well water clean: why testing matters

La Crosse County residents know the value of clean water—but many unknowingly drink from a hidden risk: contaminated private wells.

Unlike public water systems, which undergo rigorous testing, private wells rely solely on their owners for safety. Experts warn that even clear, odorless water can harbor dangerous pollutants. The solution? Test annually—no exceptions.

How Contaminants Sneak In

Heavy rains and floods don’t just cause flooding—they displace bacteria and chemicals straight into your well. Some threats, like nitrates, silently disrupt oxygen flow in the blood, posing severe risks to infants and pregnant individuals. Others, like E. coli, can trigger severe stomach issues without warning.

Here’s the unsettling truth: A well that tested clean years ago may not stay safe forever.

What You Can Do

If past tests revealed issues, retesting is critical to ensure fixes worked. Boiling water or using filters like reverse osmosis systems provides a temporary shield—but testing is the only way to confirm safety.

Good news: Free testing kits are available at local health offices and libraries, making vigilance affordable.

Bottom Line

Your well’s safety isn’t a one-time task—it’s an ongoing responsibility. Test every year, and don’t gamble with what you can’t see.