Is Bleach Safe for Quartz Countertops?

What is Quartz?

Quartz countertops, sometimes called engineered stone, are made from ground natural quartz crystals combined with resins and pigments. This combination creates a very hard, non-porous surface that resists scratches, stains, and heat.

Some key features of quartz:

  • Extremely durable – Quartz has a hardness rating of 7 on the Mohs scale, compared to a 10 for diamond. This makes it very scratch resistant.
  • Non-porous – Unlike natural stone, quartz does not absorb liquids, making it stain resistant.
  • Available in many colors/patterns – Pigments are added to create a wide array of color and pattern options.
  • Low maintenance – Quartz requires very little maintenance compared to natural stone.

Is Bleach Safe for Cleaning Quartz?

When used properly, bleach can be safe for cleaning quartz countertops. However, there are some important guidelines to follow:

Use Diluted Bleach

Never use full-strength bleach directly on quartz. Instead, dilute bleach with water at a 10:1 ratio (10 parts water, 1 part bleach). Check the bleach bottle instructions for exact dilution ratios.

Spot Clean Only

Only use diluted bleach to spot clean quartz. Do not clean the entire surface with bleach. Spot clean stubborn stains and discoloration as needed.

Rinse Thoroughly

After spot cleaning with diluted bleach, rinse the area several times with clean water to remove all bleach residue. Residual bleach left on quartz can damage the surface over time.

Limit Frequency

Limit bleach cleaning to an occasional basis, not daily or weekly. Frequent bleaching may dull quartz and cause discoloration with long-term use.

Bleach Alternatives for Cleaning Quartz

For routine cleaning, use a gentle quartz-safe cleaner instead of bleach:

  • Mild dish soap – Use a few drops of mild dish soap mixed with warm water. Rinse well after cleaning.
  • 50/50 vinegar and water – An equal mixture of white vinegar and water helps clean quartz without dulling.
  • Hydrogen peroxide – Combine hydrogen peroxide with a little dish soap for an effective disinfecting clean.
  • Stone cleaner – Use a cleaner made specifically for engineered stone/quartz.

Can Bleach Damage Quartz Countertops?

Yes, bleach can potentially damage quartz if used improperly:

  • Undiluted bleach can eat away at the resin that binds quartz particles together. This can damage the surface and cause discoloration.
  • Bleach left to sit on quartz can cause white spots as pigments fade.
  • Overuse of bleach long-term can slowly erode the finish of quartz.

To prevent damage, follow the guidelines above for safe bleach use on quartz. Never use bleach full strength, rinse thoroughly after use, and limit frequency.

Bleach Safety Tips for Quartz

When using diluted bleach for occasional spot cleaning of quartz:

  • Check bleach label for proper dilution ratios.
  • Wear gloves to protect your hands.
  • Do not mix bleach with other cleaners like ammonia.
  • Work in a well-ventilated area.
  • Rinse any overspray on countertop edges/joints.
  • Rinse sink and faucet with water after cleaning.
  • Never use bleach on polished quartz like marble-looking finishes.


Diluted bleach can be used occasionally to clean stubborn stains on quartz countertops. However, bleach should always be diluted 10:1 with water and surfaces rinsed thoroughly after cleaning. For routine maintenance, use a gentle quartz cleaner instead of bleach. With proper care, your beautiful quartz countertops can stay looking like new for many years.

Frequently Asked Questions About Using Bleach on Quartz Countertops

Can I use bleach to disinfect my quartz countertops?

Yes, you can use diluted bleach to help disinfect quartz surfaces. Make sure to dilute it appropriately and rinse it away completely afterward. For routine disinfecting, use a cleaner made specifically for quartz instead.

How much bleach should I mix with water for quartz cleaning?

Mix 1 part bleach with 10 parts water. Always check the bleach container for recommended dilutions. Never use full-strength bleach directly on quartz.

If I accidentally used undiluted bleach on my quartz, what should I do?

Rinse the area very thoroughly with clean water. Use a soft cloth and mild soap to clean the area further. This should help minimize any damage, but you may see some discoloration. Avoid undiluted bleach in the future.

Can I use bleach to clean the grout lines on my quartz countertop?

Yes, diluted bleach can help whiten and disinfect the grout lines. Apply it carefully only to the grout to avoid contact with the quartz surface. Rinse very well afterward.

How can I get white spots off my quartz after using bleach?

Mix equal parts white vinegar and water and wipe the spots with a soft cloth and the vinegar solution. This should help remove any residual bleach that is causing discoloration. Be sure to rinse well after cleaning vinegar.