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Does Bleach Remove Hard Water Stains?

Stains from hard water can be especially tough to remove. Find out if bleach will get rid of hard water stains and learn how to remove hard water stains.

More from Clorox experts

Question

Can Clorox be used to remove hard water stains from toilet bowls?

Answer

Thanks for sending in your question.  Clorox® Regular Bleach2 has so many terrific uses, but every once in a while I get a question where my favorite product is not what the person is looking for, and your question falls into that category!  The main reason is that some cleaning challenges like hard water stains require acidic cleaners (pH less than 7).  Rust is another one.  Unfortunately for your specific application, Clorox® Regular Bleach2 is pretty strongly alkaline, and furthermore should never be mixed with any acid.  We have other products to offer consumers to meet these cleaning challenges.  One that should work for you is our Toilet Bowl Cleaner-Tough Stain Remover.  You can read more about it here:  /products/clorox-toilet-bowl-cleaner-tough-stain-remover/

I hope this is helpful.  Please let me know if you have any other questions, and thanks for writing!

–Dr. Laundry