mold behind drywall near plumbing 19

https://moldremediationstlouisinfo.halcyonledger.com/posts/how-to-handle-mold-behind-drywall-a-mold-remediation-st.-louis-case-study

When we finally opened up that wall near the bathroom sink to fix a leak, we found the whole back side of the drywall covered in black and green spots, spreading out from where the plumbing runs through, a musty smell hitting us hard.