Mold Testing: What It Can Tell You
Mold testing can show that spores are present, and it cannot tell you who will get sick or whether a level is safe. The CDC does not recommend routine mold testing because no standards exist for acceptable levels in a home, and the EPA calls sampling usually unnecessary for visible mold. This guide explains when a sample is still worth paying for.
When mold testing makes sense
A sample answers a real question in three cases: mold is suspected but hidden, someone has symptoms and nothing is visible, or cleanup is done and you want to confirm it. The EPA says surface sampling can help verify a space was cleaned properly, and that sampling should be planned and read by people with expertise. If the mold is visible, the answer is to remove it.
Air, surface and bulk tests
An air sample counts spores in a short period, a surface sample lifts growth with tape or a swab, and a lab reads both. The NIOSH page at the CDC says it does not recommend routine air sampling for mold and that short-term spore counts cannot be interpreted against health risk. A close visual inspection and the nose are more reliable, per the same page.
Do home mold test kits work
Bob Vila reports that kits mostly detect airborne spores, so mold inside a wall can be missed, and that the EPA does not endorse any kit brand. A positive result does not give the type unless it goes to a lab, and a negative result does not prove a home is clean. A kit costs little, and a visit with a moisture meter tells you where the water is.
Who should test: the conflict of interest
A firm that also removes mold has a stake in how large the job is. Testing-only firms use that point, and it is fair. For a result that must stand on its own, such as a sale or a lease dispute, use a separate tester, and use a crew only for the removal.
Mold testing in Los Angeles
For a Los Angeles home the first step is usually an inspection with a moisture meter rather than a lab sample. The mold inspection page explains the visit and what it costs, and the same visit covers testing and checks.
Mold testing: questions answered
Should I test before or after mold removal?
Before is rarely needed when mold is visible. After removal, surface sampling can confirm the cleaning, per the EPA, and some buyers and insurers ask for it.
How much does mold testing cost in Los Angeles?
No Los Angeles price from an opened page is verified, so none is given. The inspection page lists what drives the cost.
Can you test your body for mold?
This guide does not cover medical tests. Ask a doctor, and see the symptoms guide for what the CDC says about health effects.