Contact & corrections
Corrections
Spot an error?
Our numbers come from public monitoring data, and public data has gaps and mistakes. If a county figure, utility match, or unit looks wrong, tell us — corrections are logged and credited, and fixes ship with the next snapshot.
Include the page URL and the value you're questioning so we can trace it to the source record.
Water safety
Water-safety questions
We map measured hardness — we can't advise on the safety of your specific water. For that, contact your water utility (see the ZIP lookup) or the EPA Safe Drinking Water Hotline at 1-800-426-4791.
Operator
Operator
Hard Water Map is operated by Moving Data Systems d.o.o., Maribor, Slovenia.