Sewage and black water cleanup

Sewage is Category 3 water — grossly contaminated — and the classification is what decides the work: porous material it soaked is removed rather than dried.

Why drying is not the answer

Water damage is graded by how contaminated the water is, not by how much of it there was. Category 3 covers sewage, flood water carrying sewage, and standing water that has become contaminated over time.

At that grade, drying a soaked porous material leaves the contamination in place and simply removes the moisture that made it obvious. Carpet, padding, drywall below the water line and any absorbent contents come out. This is the single most common corner cut, because drying is far cheaper than removal and the result looks the same for a few weeks.

What is actually in it

Faeces are not on OSHA’s list of other potentially infectious materials — the bloodborne pathogens standard is not the rule that governs sewage. But the pathogens are real and simply governed elsewhere: norovirus, hepatitis A, E. coli, and others. “Not OPIM” describes which federal rule applies, not whether something can make you ill.

The mould clock

Sewage jobs frequently become mould jobs, because the same water that carried contamination also soaked the structure. That needs a different credential set — the IICRC’s mould remediation certification rather than its trauma one — and it starts within days, not weeks.

Insurance

Sewage backup is commonly excluded from a standard homeowners policy and offered as a specific endorsement instead. Check whether you have that endorsement before you assume you are covered, and ask the adjuster directly which peril the claim is being assessed under.