HomeMy WebLinkAboutMOLD FAQReviewed 5/29/2014
Iowa Department of Public Health
Bureau of Environmental Health Services
Frequently Asked Questions about Mold
Overview: Mold is a natural part of the outdoor environment. Mold is present in outdoor air
at some level throughout the year. In order for mold to grow indoors, there must be a
significant source of water, moisture or humidity.
How do I know if I have a mold problem?
If you see or smell mold in your home, you probably have some mold growth.
What causes mold?
Mold growth problems are ALWAYS caused by a moisture or water problem. It does no good
to clean the mold if you haven’t solved the water issue first.
Where should I look for mold?
Look for mold in places where there may be
water issues (under sinks, in laundry rooms,
kitchens, bathrooms, where a roof has leaked, in
the basement, etc.).
Should I test my home for mold?
No. The Iowa Department of Public Health does
NOT recommend testing for mold for several
reasons:
Mold is present at some level in outdoor air
throughout the year so test results may be
unreliable.
It is very difficult, even for professionals,
to get meaningful test results for mold.
Mold testing is very costly.
There are no regulatory levels or
guidelines for comparing test results.
Will mold make me sick?
Mold can cause an allergic reaction in some individuals. About 50% of the population of the
United States is allergic to mold. If you are NOT allergic to mold, it is unlikely that you will
have health effects from mold exposure. If you are allergic to mold, your reaction depends
on how sensitive you are to mold. Symptoms of an allergic reaction are
Itchy or watery eyes, runny nose,
Sinus drainage,
Respiratory discomfort, and
Cough.
Reviewed 5/29/2014
I’ve identified the area covered in mold, how do I clean it up?
If the material is non-porous (it will not absorb water) such as a concrete, tile or vinyl
flooring, plastic patio furniture, plastic toys, tub surrounds, paneling, molding, etc., use a
mild household detergent solution to wipe away the mold. If it is a porous surface (it will
absorb water) such as drywall, carpeting, furniture, bedding, clothing, stuffed animals,
books, etc., remove, discard, and replace the items or surfaces the mold is growing on.
It is not necessary to use bleach on mold, unless your intention is to disinfect the surface. If
you choose to use bleach to disinfect an area or to remove mold stains, follow these
guidelines:
1. Clean the surface first and remove all debris.
2. Provide ventilation with a fan, open window, or door.
3. Prepare the bleach solution according to the manufacturer’s instructions. Keep the
surface wet for 15 minutes before wiping it down.
4. Never mix bleach with ammonia or any other cleaners.
5. Rinse the area with clean water.