How to clean black water stains in a toilet

Written by arwen r. petty
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to clean black water stains in a toilet
Remove black water stains from your toilet bowl with these simple-to-follow directions. (cleaning and sanitation products studio isolated image by dinostock from

Black stains in your toilet bowl are the result of hard water containing calcium and limestone deposits. As these mineral deposits accumulate, unsightly black rings form that are difficult to remove. Despite how clean it actually is, stains make your toilet appear filthy. Read on to find out how you can eliminate these unattractive water stains.

Skill level:

Other People Are Reading

Things you need

  • Liquid Chlorine Bleach
  • Plastic Toilet Brush
  • Pumice Stone (also called a "Pumie Stick")
  • Borax Powder
  • Rubber Gloves
  • Protective Face Mask

Show MoreHide


  1. 1

    Put on the protective face mask and rubber gloves. Open any windows or doors in your bathroom to promote ventilation.

  2. 2

    Pour two cups of liquid bleach into your toilet. Using the plastic toilet brush, mix the bleach into the toilet water and lightly scrub the stains to loosen the deposit build-up. Leave the bleach in the water for 30 minutes.

  3. 3

    Flush your toilet 2-3 times to completely eliminate the bleach. Sprinkle Borax Powder over the stains. Allow the powder to sit on the stains for one to-12 hours, depending on their intensity.

  4. 4

    Using the Pumie Stick, gently scrub the discolourations in small, circular motions. Repeat as necessary until the black water stains disappear.

Tips and warnings

  • Borax Powder and Pumie Sticks can be found at your local hardware or home improvement store. Bleach, rubber gloves and protective face masks are available from the grocery or chemist.
  • Bleach and Borax Powder are powerful and hazardous cleaning agents. Don't let them touch your skin, hair, or clothing-- if this happens accidentally, immediately rinse the affected area with cold water. Seek medical help if necessary.
  • DO NOT mix the bleach and Borax Powder. This will create highly toxic and potentially deadly fumes.
  • If you begin to feel faint or dizzy from the fumes of the cleaning products, leave the room for some fresh air. Return only when you feel normal again.

Don't Miss


  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.