Mold (fungi) is present everywhere, indoors and outdoors. There are more than 100,000 species of mold, at least 1,000 of which are common in America. Species of Cladosporium, Penicillium, and Aspergillus are some of the most commonly found species. Mold most likely grows in bathrooms, basements, and anywhere else where there is dampness or water. Many types of mold routinely encountered aren’t hazardous to healthy individuals. Too much exposure to mold may cause a worsening of such conditions as asthma, hay fever, or other allergies. Fevers and breathing problems in a vulnerable individual are possible but unusual. When moldy material becomes damaged or disturbed, spores, which are reproductive bodies similar to seeds, can be released into the air. Exposure can occur if people inhale the spores, directly handle moldy material, or accidentally ingest the spores. Since all molds need water to grow, mold can grow almost anywhere where there is high humidity, dampness, or water damage. Most often molds are confined to areas near the water source. Removing the source of moisture through repairs or dehumidification is crucial in preventing mold growth. Correcting underlying water damage and cleaning the affected area is the best way to treat mold. If mold contamination is extensive, a professional mold remediation company may be needed.
Ten Things You Should Know about Mold
- Potential health effects and symptoms associated with mold exposures include allergic reactions, asthma and other respiratory complaints.
- There is no practical way to eliminate all mold and mold spores in the indoor environment; the way to control indoor mold growth is to control moisture.
- If mold is a problem in your home or school, you must clean up the mold and eliminate sources of moisture.
- Fix the source of the water problem or leak to prevent mold growth.
- Reduce indoor humidity (to 30-60%) to decrease mold growth by:
- Venting bathrooms, dryers and other moisture-generating sources to the outside
- Using air conditioners and de-humidifiers
- Increasing ventilation
- Using exhaust fans whenever cooking, dishwashing and cleaning
- Clean and dry any damp or wet building materials and furnishings within 24-48 hours to prevent mold growth.
- Clean mold off hard surfaces with water and detergent, and dry completely. Absorbent materials such as ceiling tiles, that are moldy, may need to be replaced.
- Prevent condensation: Reduce the potential for condensation on cold surfaces (i.e., windows, piping, exterior walls, roof, or floors) by adding insulation.
- In areas where there is a perpetual moisture problem, do not install carpeting (i.e., by drinking fountains, by classroom sinks, or on concrete floors with leaks or frequent condensation).
- Molds can be found almost anywhere; they can grow on virtually any substance, providing moisture is present. There are molds that can grow on wood, paper, carpet, and foods.
How do I get rid of mold?
It is impossible to get rid of all mold and mold spores indoors; some mold spores will be found floating through the air and in house dust. The mold spores will not grow if moisture is not present. Indoor mold growth can and should be prevented or controlled by controlling moisture indoors. If there is mold growth in your home, you must clean up the mold and fix the water problem. If you clean up the mold, but don’t fix the water problem, then, most likely, the mold problem will come back.
Read more about mold at www.epa.gov/mold
- The key to mold control is moisture control.
- If mold is a problem in your home, you should clean up the mold promptly and fix the water problem.
- It is important to dry water-damaged areas and items within 24-48 hours to prevent mold growth.
Is sampling/testing for mold necessary?
In most cases, if visible mold growth is present, sampling is unnecessary. Since no EPA or other federal limits have been set for mold or mold spores, sampling cannot be used to check a building’s compliance with federal mold standards. Surface sampling may be useful to determine if an area has been adequately cleaned or remediated. Sampling for mold should be conducted by professionals who have specific experience in designing mold sampling protocols, sampling methods, and interpreting results. Sample analysis should follow analytical methods recommended by the American Industrial Hygiene Association (AIHA), the American Conference of Governmental Industrial Hygienists (ACGIH), or other professional organizations.
Investigating hidden mold problems may be difficult and will require caution when the investigation involves disturbing potential sites of mold growth. For example, removal of wallpaper can lead to a massive release of spores if there is mold growing on the underside of the paper. If you believe that you may have a hidden mold problem, consider hiring an experienced professional.
For more information on mold, see www.epa.gov/mold