| Hazard | Source | Severity | |--------|--------|----------| | | Sewage (E. coli, Giardia, Hepatitis A) | High | | Mold | Standing water | Medium (long-term) | | Structural damage | Wood rot, drywall wicking | High | | Electrical shock | Water near outlets | High | | Slip/fall | Wet floors | Medium |
In bathroom drains, a combination of hair and soap residue commonly causes slow drains and eventually complete backups. Dangers of an Overflowing Drain overflowing drain