Why flood water is handled differently
Under ANSI/IICRC S500, water is sorted into three categories. Category 1 is clean water, such as a supply line. Category 2 carries some contamination, such as washing machine discharge. Category 3 is grossly contaminated, such as sewage or river and storm water.
Flood water from outside usually counts as Category 3 because it picks up soil, chemicals and bacteria on its way in. That changes the job. Porous materials like carpet and insulation usually come out, surfaces are cleaned and sanitized, and crews wear protective gear.
Sewage backup cleanup: what to do first
A sewage backup through a floor drain, toilet or tub is a flood-category event even if the amount is small. Stay out, keep people and pets out and do not run fans, because moving air spreads contamination. Do not use the affected plumbing.
A crew removes the water, then removes and bags porous materials the water touched, cleans surfaces and applies antimicrobial products. Hard surfaces can often be cleaned. Carpet, pad and drywall below the water line usually cannot. If the backup came from the main line, the city or a plumber may need to clear it before the structure can be dried.
Basement flooding cleanup
If your property has a basement, below-grade garage, utility room or crawl space, flood water collects there first. Groundwater seepage, a failed sump pump and a backed-up drain are the common sources, and each needs a different fix. Extraction comes first, then drying, then a check of the source.
Low areas are slow to dry because they hold humidity. Crews use dehumidifiers sized for the space and keep checking the readings. Walls that were submerged are opened to confirm that the cavity behind them dries. If you see dark growth after a flood, that is a mold remediation question rather than a cleaning one.
When flooding is an emergency
Call at once if water is entering from outside, if there is sewage, if the water is rising, or if it touches outlets or appliances. Do not walk through standing water that might be near electricity. Cut power only if the panel is dry and reachable.
While you wait, move valuables to higher ground, photograph the water line and the damage, and keep notes of what was wet. Those records help your claim, because flood damage is usually excluded from standard policies and often needs separate flood coverage. Ask your insurer which applies to you.
Flood water in the building?
Call the 24/7 line now. Do not wade through it.
Which water category means what
| Category | Typical source | Usual handling |
|---|---|---|
| 1 | Supply line, rainwater from a clean source | Extract and dry, many materials can be saved |
| 2 | Washing machine or dishwasher discharge | Extract, clean, dry, remove porous materials if wet long |
| 3 | Sewage, storm and river water | Remove porous materials, sanitize, dry, protective gear |
Category 1 water can degrade into Category 2 or 3 if it sits, which is another reason to call early. The steps that follow cleanup are described under water damage cleanup.
Cost factors and insurance
Price follows the category of water, the area flooded, the materials that must be removed and the days of drying. Sewage and flood jobs involve more removal and sanitizing than a clean-water leak, so scope and price are explained before work starts.
Ask your insurer whether your policy covers sewer backup, and whether you have separate flood coverage. Do not assume either. Want your real number? Call the 24/7 line.
Flood risk around Montebello: what to verify yourself
Montebello sits roughly 8 miles east of downtown Los Angeles with the Rio Hondo along its east side, and Whittier Narrows Dam is nearby in Pico Rivera. In 2019 the U.S. Army Corps of Engineers reported that the dam no longer meets its tolerable-risk guidelines. Check the FEMA Flood Map Service Center for your address and ask your insurer about flood coverage before a storm, not after.
The 2020 Census counted 20,308 housing units here and 55.6 percent were rented. Renters should ask the landlord about the building's flood and sewer-backup coverage, and buy renter's coverage that fits what they own.
Flood damage questions
Is flood water always Category 3?
Water from outside, such as storm runoff or river water, is generally treated as Category 3 under S500. Clean-water leaks begin at Category 1. A crew assesses the source and how long the water has sat.
Can carpet be saved after a flood?
Usually not if the water was Category 2 or 3. Carpet and pad are porous, and sanitizing them in place is not reliable. After a clean-water leak and a quick response, carpet can sometimes be dried.
Does homeowner insurance cover flooding?
Flood damage is usually excluded from standard homeowner policies and needs separate flood coverage. Sewer backup is also commonly separate. Check your policy and ask your insurer.
Do you handle flood damage emergencies at night or on weekends in Montebello?
Yes, including during storms. Flooding does not keep office hours, so the line stays open through nights, weekends and holidays. Stay out of the water and call, and a crew is sent the same day when one is available.