Following on from How can I remove calcium deposits from a drain it looks like my water softener may not be working. How do I measure how hard my water is?

up vote 4 down vote accepted

Home improvement stores typically carry test kits. I've found them right by water filters and water softeners. They usually are small paper strips that change color based on levels of hardness. The kit will also come with a legend to allow you to compare the strips.

Conductivity meters may be found online for about $12 American. They'll give you a direct reading in PPM. Some hardware stores carry the things too, but they'll ask $30 plus for them. I tested my cheap one against known standards, and it works just fine.

Your Answer


By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.