Black mold, without the panic

What people mean by black mold

CDC describes Stachybotrys chartarum as a greenish black mold⁴. It grows on materials with a lot of cellulose such as fiberboard, gypsum board and paper⁵, and it needs constant moisture to grow². Plenty of other molds look black too. Color alone does not tell you the species.

Why it shows up behind a desert wall

Constant moisture is rare in Las Vegas air, so when Stachybotrys appears it points at a steady leak. A washer box, a toilet supply, a water heater pan or a slab line. The back of drywall stays dark and damp for weeks when a pipe drips into the wall cavity. That is the habitat CDC describes.

What the health agencies actually say

CDC says Stachybotrys and other molds may cause symptoms that are nonspecific, meaning not unique to one mold⁶, and that no test proves a link between Stachybotrys and a person's particular symptoms³. EPA says symptoms other than allergic and irritant types are not commonly reported from breathing mold⁷.

That does not make it harmless. CDC lists stuffy nose, sore throat, coughing or wheezing, burning eyes and skin rash as reactions some people have⁸, and people with weak immune systems or long term lung disease can get lung infections⁹. If you have health concerns, EPA says talk to a health professional¹⁰.

The plan does not change

CDC says if Stachybotrys or other molds are found in a building they should be removed¹¹. That means the same steps as any remediation. Fix the leak, contain the area by size, cut out wet drywall and dry the cavity. Paying for a lab to name the species rarely changes any of it.

What you get when you call

Send a photo by text to (702) 728-4493. You get an honest read on size and likely cause, and whether it sounds like a job you can handle or one that needs containment.