Mold problems in buildings happen when there is too much moisture from leaks or condensation. The Idaho Department of Health and Welfare (IDHW) does not test for mold, but we offer resources to help renters and landlords deal with moisture issues.
Mold is a type of fungus that grows both indoors and outdoors. It is very common and can be found almost everywhere. Mold grows best in warm, damp, and humid conditions.
Mold information
Being around mold can cause health symptoms, including:
- Runny nose
- Sneezing
- Watery eyes
- Skin rashes
- Headaches
- Trouble breathing
Some people are more sensitive to mold than others, especially if they:
- Have allergies or asthma
- Have weakened immune systems
If you or a family member has health problems you think are caused by mold, talk to your doctor.
In most cases, testing is not needed. You can often see or smell mold.
Mold can be:
- Black, green, yellow, or white
- Found in damp areas like bathrooms or basements
The color does not tell you how harmful it is. Any mold should be removed, and the source of moisture should be fixed.
Note: The Department of Health and Welfare does not test or inspect homes for mold. We can provide information and advice on how to manage it.
You can clean up mold using the same steps no matter what type it is:
1. Fix the moisture problem.
Mold will return if the source of moisture is not fixed.
2. Check the size of the moldy area.
If the area is larger than 10 square feet, consider hiring a professional.
Search for Fire and Water Damage Restoration companies in your area.
3. Protect yourself during cleanup.
Use:
• Rubber gloves
• Goggles
• Protective clothing
• A respirator (to avoid breathing in mold spores)
4. Dry wet materials right away.
• Move wet items away from floors and walls.
• Use fans and dehumidifiers if needed.
5. Clean hard surfaces.
• Use a stiff brush and mild detergent.
• Rinse and let dry.
• Wash clothes, bedding, and soft items if possible.
• Throw out items that are moldy inside and cannot be cleaned.
6. Disinfect.
• Mix ¼ to ½ cup of bleach per gallon of water.
• Apply to hard surfaces after cleaning. Let dry.
• Never mix bleach with ammonia.
7. Keep an eye on the area.
• Watch for new mold or moisture.
• If mold comes back, repeat the cleaning steps or consider replacing the material.
You can prevent mold by controlling moisture:
Repair and Ventilate
- Fix leaks quickly
- Use exhaust fans in bathrooms, kitchens, and laundry rooms
- Open windows and doors to improve airflow
- Insulate and ventilate attics and crawl spaces
Clean and Dry
- Clean and dry wet carpets, bedding, and furniture within 24–48 hours
- Vacuum and clean regularly to reduce mold spores
- Wipe up spills and condensation right away
- Remove moisture on windows and walls
There are no federal or Idaho state laws that require mold inspections or set cleanup standards.
Both renters and landlords are responsible for dealing with mold-related problems:
- Landlords are usually responsible for fixing leaks and structural issues.
- Renters are responsible for preventing indoor condensation by using ventilation and cleaning up moisture.
Some mold problems may involve legal or housing rights issues. Contact your local housing agency for help if needed.
*DHW does not address legal disputes between tenants and landlords.