Skip to main content

How to Remove a Hard Water Mark from a Bathroom Sink

Hard water can leave unsightly mineral deposits in your bathroom sink. Chemical changes in the porcelain may prevent it from looking like new, but you can remove the marks.


  • Step 1: Use vinegar and baking soda Make a paste with white vinegar and baking soda. Apply the paste to the stain and let it sit for 15 minutes. Then wash the paste down the drain and rinse the area with clean water.
  • Step 2: Try sequestrants Add a teaspoon of a cleaning product containing sequestrants, additives which capture and deactivate minerals in water, such as Calgon, in a gallon of water if the stain stubbornly remains. Thoroughly scrub the hard water mark with a sponge or rag soaked in the solution.
  • Step 3: Use TSP Dissolve 2 to 3 tablespoons of trisodium phosphate, or TSP, in a gallon of water, rinse the water mark with the solution for stains that continue to cling. Rinse away residue with clean water.
  • TIP: Always wear gloves when cleaning with TSP.
  • Step 4: Use lemon juice Make a paste with lemon juice and baking soda for a natural approach at removing the stain. Apply the paste to the stain and let it sit for 15 minutes. Then wash away the paste along with the stain.
  • Step 5: Use vinegar and lemon juice Mix a cup of white vinegar with a tablespoon of lemon juice if the baking soda didn't do the trick. Soak a soft, absorbent towel in the solution and scrub the water mark. Then rinse away the residue and clean the sink.
  • Step 6: Prevent future marks Prevent future water marks in your sink by drying the sink after each use and by cleaning it regularly with a mild detergent. A little work now will save you lots of elbow grease later.
  • FACT: Hard water scale can form on skin, dull the complexion, and make hair dry and brittle.

You Will Need

  • White vinegar
  • Baking soda
  • Sequestrants
  • Sponge or rag
  • Trisodium phosphate
  • Lemon juice
  • And mild detergent
  • Gloves (optional)

Popular Categories