Flood restoration in NYC, from the basement up

Restorers follow a published standard for water damage, the ANSI/IICRC S500. It sorts water into three categories by how contaminated it is. Its definition of the worst, Category 3, reads: water that “is grossly contaminated and can contain pathogenic, toxigenic, or other harmful agents and can cause significant adverse reactions to humans if contacted or consumed.”

The examples it gives read like a list of New York flood events: sewage, wasteline backflows from beyond a trap, all forms of flooding from seawater, rising water from rivers or streams, and wind-driven rain from hurricanes and tropical storms. The CDC lists what floodwater can carry, from human and livestock waste to household and industrial hazardous waste and downed power lines.

The IICRC’s 2026 position statement adds a caution in the other direction: water from weather events and top-down leaks is not automatically Category 3. The category is set by the restorer’s inspection, and with Category 2 or 3 water the standard says remediation comes before drying, with contamination controls and worker protection. That is why a provider who sees your building will want to know where the water came from before quoting.

“The key to mold control is moisture control,” in the EPA’s words, and its guidance is to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth. Standing water and wet materials, the EPA adds, are a breeding ground for viruses, bacteria and mold. In a basement with no windows and little air, wet drywall, carpet and stored boxes stay wet for a long time unless the water is pumped out and the air is dried.

Two safety rules from the EPA matter while you wait. Run a fuel-powered generator only outside and at least 20 feet from the building, never in a home, garage or shed, because the carbon monoxide it makes can kill in minutes. And do not mix cleaning products or add bleach to other chemicals. The EPA also advises against running a heating or cooling system you know or suspect is contaminated with mold.

After the power is checked by an electrician, as the CDC advises, the work follows a familiar order: pump or extract the water, remove what cannot be saved, clean, then dry with air movers and dehumidifiers until the materials are dry. The flood cleanup guide walks through each step, and flood water pumping covers getting standing water out.

FloodSmart, the site of the National Flood Insurance Program, puts it plainly: “Most homeowners insurance does not cover flood damage,” and FEMA says homeowners and renters insurance do not typically cover flood damage. Flood cover is its own policy, and a flood policy generally takes effect 30 days after purchase, with a few exceptions such as a policy bought with a new mortgage.

FloodSmart also says damage caused by a sewer backup is covered by flood insurance if the backup is a direct result of flooding. Whether your own loss is covered depends on your policy, so check your own policy or ask your agent before anything is thrown away. Photographs and a list of what got wet help whatever the answer. The flood insurance basics page sets out what FEMA and FloodSmart say, and the NYC flood zones guide explains the maps that set flood insurance risk.

Flood Restoration NYC is an independent referral service, not a restoration company or an insurer. When you send the form, an independent local provider can contact you and quote any work directly; what your insurer pays is between you and your insurer.