Property Owner A Brief Guide to Mold, Moisture and Your Home The EPA’s guidance says homeowners should fix water problems quickly, dry wet materials within 24 to 48 hours and keep indoor humidity below 60 percent when possible. The agency also says visible mold usually makes sampling unnecessary. EPA · August 1, 2026 · 1 min read The EPA’s guidance says homeowners should fix water problems quickly, dry wet materials within 24 to 48 hours and keep indoor humidity below 60 percent when possible. The agency also says visible mold usually makes sampling unnecessary. Source: EPA. Topics: perplexityproperty-owner Sources & Citations EPA ↗