The staining is an aesthetic rather than a health issue.
How to clean mold concrete basement walls.
Saturate the walls with the peroxide then let it sit for up to 30 minutes.
Assuming the floor is concrete spray the area with a borax water solution.
Clean up the solution and any debris with paper towels.
Before cleaning mold in a basement remove and clean any contaminated items such as boxes furniture or clothing.
To kill mold on concrete basement walls or for an ideal diy mildew remover pour 3 hydrogen peroxide into a spray bottle.
Step 1 clean your basement walls.
Occasionally the mold growth will leave behind a stain even after a vigorous cleaning.
Avoid prolonged moisture exposure in the basement to avoid mold growth.
You can deep clean your concrete by using trisodium phosphate which is a strong detergent that can degrease as it removes mold and dirt.
A better way to clean mold on basement walls is to use a one to one solution of white vinegar and water.
Small amounts of water can also be absorbed with a sponge or towel and wrung into a bucket for removal.
Use a shop vac to remove the water as it accumulates on the floor of the basement.
Alternatively for porous surfaces try a mixture of liquid dish detergent water and bleach.
Next pour the newly formed cleaning solution into an empty spray bottle and proceed to vigorously apply it to your mold laden basement walls.
The vinegar will not only penetrate the concrete better it will also act as a disinfectant.
Begin this step by combining warm water with a mild brand of soap.
Before you can begin the mold removal process you must give your concrete basement walls a thorough cleaning.
Mix 1 4 to 1 2 cup of tsp per gallon of warm water and wear rubber gloves and goggles while scrubbing with it.
Scrub the vinegar solution into the concrete using a scrub brush with stiff bristles.
Vinegar will kill 82 of mold species.
Use a power washer or simply wash with a brush and clear water.