Why Campello needs this specifically
In Campello’s shared-wall triple-deckers, lingering odor can originate in one unit’s plumbing but be noticed in an adjoining unit, so source identification checks beyond just the complaining household.
Shared sewer laterals in older triple-decker buildings mean a single backup or root intrusion event can flood more than one unit at once, and cross-contamination risk between units is real once black water is standing.
What to know before you call
Persistent odor after cleanup usually means contamination remains in porous materials — see the sewage odor removal hub for the full source-identification process. See the full sewage odor removal breakdown →