Check the lowest level and foundation edge for new water clues
New staining, dampness, musty odor, pooling, or a changed crack can reveal a water path before finishes and belongings hide it.
When it usually needs attention
Ongoing home-care habit
EPA and HUD guidance supports prompt moisture-source correction and condition checks after wet weather, not a universal repair interval.
When this guide applies
Every occupied home gets a ground-level observation route; inaccessible or shared foundation areas remain a reporting boundary.
What to do
From normal floors and stable ground, compare the lowest occupied level, visible slab or foundation edge, and nearby drainage after heavy rain; photograph changes and correct only an obvious safe source such as a misplaced downspout extension.
Applies when: Every occupied home gets a ground-level observation route; inaccessible or shared foundation areas remain a reporting boundary.
Who should handle it: Residents may observe and report; excavation, structure, drainage, shared walls, crawlspaces, waterproofing, and common areas belong to the responsible owner or qualified trade.
Tools
- Flashlight
- Phone camera or dated observation log
Parts and supplies
- Temporary floor marker or container only for a small clean-water drip that is safe to approach
Safety gear
- Slip-resistant footwear
- Avoid exposure instead of relying on consumer PPE for sewage, floodwater, mold, or animal waste
Before you start
- Observe only from stable intended walking surfaces
- Keep people and pets away from unknown contamination
Power, water, or fuel shutoffs
- Use only a known safe water shutoff for an active clean-water leak
- Do not approach wet electrical equipment
Cleaner or chemical limits
No bleach, fragrance, sealant, paint, pesticide, drain cleaner, or degreaser is used to hide a water clue; identify and correct the source first.
Stop and get help when
- Stop for sewage, floodwater, wet electricity, structural movement, a rapidly changing crack, hidden or widespread growth, or an unsafe crawlspace
- Do not excavate, open finishes, enter confined space, or disturb unknown material
Who to call: Use emergency or utility help for immediate danger and the responsible owner plus qualified drainage, plumbing, structural, envelope, electrical, or remediation service for the source.
Reviewed sources
- A Brief Guide to Mold, Moisture and Your HomeU.S. Environmental Protection Agency · reviewed July 13, 2026
- Moisture Control GuidanceU.S. Environmental Protection Agency · reviewed July 13, 2026
- FloodsFEMA Ready.gov · reviewed July 13, 2026
- Healthy Homes Maintenance ChecklistU.S. Department of Housing and Urban Development · reviewed July 13, 2026