Bleach to Water Ratio to Clean Mold and Mildew

After removing mold and mildew from a surface in your home, you can disinfect the area with a mixture of bleach and water. The ratio of bleach to water depends on the surface you need to clean.

Clean Surfaces

For most clean surfaces like hard plastics, glass and countertops, a solution of 1/4 to 1/2 cup of bleach to 1 gallon of water will clean away mold and mildew. Use a sponge to wipe down the affected area, and allow it to air dry, according to the Minnesota Department of Health.

Dirty Surfaces

For dirty and porous surfaces like wood and concrete, a higher ratio of bleach to water can be used. Mix between 1 and 1 1/2 cups of bleach with 1 gallon of water, and then use the solution to clean the area, according to North Dakota State University.

Considerations

When cleaning with bleach, make sure you are in a well-ventilated area. Wear gloves to protect your skin from the bleach. You can test a small, inconspicuous portion of the material that needs to be cleaned to see if the bleach causes discoloration. Never combine bleach and ammonia-based cleaners.

References

• North Dakota State University: Remove Mold for a Healthy Home
• Minnesota Department of Health: Mold in Homes