DisasterPRO Restoration handles black water damage (IICRC Category 3) and sewage cleanup in Kent, Renton, Tacoma, Fife and Seattle, WA. Founded in 2018 in Kent and locally owned, the team answers calls in person day or night, dispatches a crew immediately, works with full PPE and hospital-grade disinfectants, and bills insurance directly. Black water is contaminated water such as sewage, so keep people and pets away from it.
Black Water Damage Explained: What IICRC Category 3 Means
Black water damage is the common name for grossly contaminated water, which IICRC-trained restorers classify as Category 3.
The category describes where the water came from and what it carries, not its color. Water that looks fairly clear can still be Category 3 if it backed up from a sewer line or flowed in from outside, and a restorer handles it that way.
Category 3 water remediation is stricter than a clean supply-line cleanup. It involves protective gear, containment of the affected area, disinfection and removal of materials that absorbed the water. The table below is general guidance for telling the categories apart.
Clean or gray water that sits for a while can degrade. For that reason a technician may reclassify an older leak as more contaminated after inspecting it, even if it started as a clean leak.
| Category | Typical source examples | General handling |
|---|---|---|
| Category 1 (clean water) | Broken supply line, sink overflowing from the tap | Extraction and drying |
| Category 2 (gray water) | Washing machine or dishwasher discharge, toilet overflow without waste | Extraction, cleaning, drying, closer review of porous materials |
| Category 3 (black water) | Sewage backup, toilet overflow with waste, floodwater from outside | Full PPE, containment, removal of saturated porous materials, disinfection, drying |
Common Causes of Black Water Damage in a Home
Black water damage in a home starts at a source that carries waste or outside contamination into living space, a basement or a crawlspace.
Sewage backup is the cause most homeowners picture first, but it is not the only one. Any water that has mixed with waste, soil runoff or floodwater should be treated as contaminated until someone qualified inspects it.
Crawlspace sewage is easy to miss because no one walks there. A broken drain line under the house can leak for some time before anyone notices. DisasterPRO Restoration works in crawlspaces as tight as 18 inches, including those with raw sewage.
- Sewer line or main drain backup through a floor drain, tub or toilet
- Toilet overflow that contains waste
- Broken or disconnected drain line under the house or in a crawlspace
- Floodwater or surface runoff entering from outside
- Clean or gray water left standing long enough to degrade
Why Black Water Remediation Needs a Professional Crew
Black water remediation is a contaminated-materials job rather than a mop-and-fan cleanup, because sewage and floodwater can carry bacteria, viruses and other contaminants.
As general guidance, restorers remove porous materials that soaked up Category 3 water, such as carpet pad, insulation and wet drywall, rather than trying to dry them in place. Hard surfaces are cleaned and disinfected.
Cleaning up black water yourself means handling contaminated material without the containment, protective equipment and disinfectants a restoration crew brings. It also risks tracking contamination into clean rooms on shoes, tools and clothing.
For questions about personal protection, follow a restoration professional or the product manufacturer's directions. If anyone in the home has health concerns after contact with black water, ask a medical professional.
Black Water Decision Checklist: Signs That Call for Caution and Inspection
A black water decision checklist helps a homeowner sort clear signs of Category 3 water from signs that only call for caution until a technician inspects the leak.
Water that came from a sewage backup, contains visible waste or entered from outside as floodwater should be treated as black water from the start. The caution signs below do not by themselves make water Category 3; they are reasons to keep people away from the area and have the source and contents checked on site. The checklist is general guidance and does not replace an inspection.
- Clear sign: the water backed up from a sewer line or main drain
- Clear sign: there is visible waste or toilet paper in the water
- Clear sign: the water entered from outside as floodwater or surface runoff
- Caution sign: the water came up through a floor drain, tub or shower drain and the source is not yet known
- Caution sign: the leak is in a crawlspace near drain lines
- Caution sign: the water has been sitting and you do not know when the leak started
- Caution sign: there is a sewage odor in the room or coming from vents
- Caution sign: carpet, insulation or drywall is soaked and the source has not been confirmed
What to Do in the First Hour After a Sewage Backup
The first hour after a sewage backup or black water flood is about keeping people safe and stopping the contamination from spreading to clean areas.
Leave the cleanup itself to a crew with protective equipment. The steps below are general guidance for what a homeowner can do safely while help is on the way, and the guide on what to do after water damage before cleanup covers the waiting period in more detail.
- Keep children, pets and anyone without protective gear out of the affected area
- Avoid walking through the water and keep doors to clean rooms closed
- Stop using sinks, toilets and drains connected to the backup
- Leave any electrical decision near the water to an electrician or your utility
- Photograph the water and damaged items from a safe spot for the insurance claim
- Do not use a household vacuum or fans on the area, which can spread contamination
- Call your insurer and a restoration company that handles sewage cleanup
How DisasterPRO Restoration Handles Black Water Remediation
DisasterPRO Restoration handles sewage backups and black water with full PPE and hospital-grade disinfectants, including in tight crawlspaces. The company is IICRC certified, takes 24/7 emergency calls in King and Pierce County, and also serves Kitsap County.
The office is at 26921 40th Ave S, Kent, WA 98032, and the team serves customers in English, Portuguese and Spanish. The company operates a fleet of three trucks and is rated 4.6 out of 5 on Google as of October 2026.
The sequence below is general guidance; the exact scope is set after the inspection. Kent homeowners can read more about water damage restoration service in Kent, and Seattle homeowners can see the page on water damage restoration in Seattle.
Because the team includes people with backgrounds in both mitigation and remodeling, with 40+ years of combined remodeling experience, the same company can carry the job from cleanup to rebuild. To start, request a free inspection with no obligation.
- A person answers the call day or night and a crew is dispatched immediately
- Water extraction and sewage cleanup with full PPE
- Removal of contaminated materials and disinfection with hospital-grade disinfectants
- Drying with commercial dehumidifiers and air movers, with moisture levels checked daily until the home is completely dry
- Mold remediation if needed: find the source, contain the spread, remove it safely and work to keep it from returning
- Rebuild: drywall, flooring, paint, trim, fixtures and cabinetry
Black Water Cleanup Cost, Timeline and Insurance
No fixed price for black water cleanup is published by DisasterPRO Restoration, because the cost depends on the size of the affected area, how long the water sat, which materials must be removed and how much rebuild follows.
Category 3 work also adds steps that clean-water jobs do not need, such as containment, protective equipment, disinfection and disposal of contaminated materials. The page on how much water damage restoration costs explains the cost drivers in more depth.
Black water cleanup time has no single answer either. Drying continues until daily moisture checks show the home is completely dry, and rebuild time depends on the scope. The guide on how long water damage restoration takes walks through the phases.
DisasterPRO Restoration bills insurance directly and helps with the claim. Coverage for sewage backup depends on your policy, so read the guide on whether homeowners insurance covers water damage restoration and confirm with your insurer. When you compare estimates, ask each company these questions:
- Did you classify the water as Category 3, and why?
- Which materials will be removed, and which will be cleaned and kept?
- How will the work area be contained from the rest of the home?
- What disinfectant will be used on hard surfaces?
- How will drying be measured, and how often will moisture be checked?
- Is the rebuild part of the same scope or a separate estimate?
- Will you bill my insurer directly and send documentation for the claim?
Mistakes That Cause Rework After Black Water Damage
Black water damage often leads to rework when a step is skipped early, because contamination or moisture left behind shows up later as odor, staining or mold.
The mistakes below are general guidance drawn from how Category 3 jobs are normally handled. Avoiding them helps keep finished rooms from having to be opened up and cleaned again.
- Treating sewage water as a clean leak and only drying it
- Keeping soaked carpet pad, insulation or drywall to save money
- Closing walls or installing new flooring before moisture checks confirm the area is dry
- Forgetting the crawlspace under the affected room
- Running the HVAC system or fans that move air from the contaminated area into clean rooms
- Throwing out damaged items before photographing them
- Fixing the water damage without repairing the drain or sewer line that caused it
Frequently asked questions
Why would water come out black?
Water comes out black or dark from a drain, toilet or tub when it is carrying sewage, debris or sediment from a backed-up drain or sewer line. The color alone does not set the water category: dark water that came from a sewage backup or contains waste is Category 3 black water, while discoloration from sediment alone may not be. Until a plumber or restoration technician confirms the source, stop using the connected fixtures and keep people away from it. Dark water from a faucet is a different issue for a plumber or your water utility.
How long does it take to clean up after a flood?
Cleanup after a flood takes as long as extraction, removal of contaminated materials and drying require, so there is no single timeline. DisasterPRO Restoration checks moisture levels daily until the home is completely dry, and rebuild time depends on how much drywall, flooring and cabinetry must be replaced.
Is black mold from water damage toxic?
Whether black mold from water damage affects health is a question for a medical professional, and color or appearance alone cannot identify a type of mold. DisasterPRO Restoration uses moisture meters and infrared cameras during mold inspections to find hidden water, then finds the source, contains the spread, removes the mold safely and works to keep it from returning.
Why is black water so expensive?
Black water cleanup costs more than a clean-water job because Category 3 water requires protective equipment, containment, disinfection and removal of porous materials that absorbed the water, followed by drying and rebuild. No fixed price is published; DisasterPRO Restoration offers a free inspection with no obligation and bills insurance directly.
Dealing with water, mold or fire damage right now? Call DisasterPRO Restoration at (206) 880-1421 or request an estimate online.