Why is sewage treated differently from clean water?
Sewage carries bacteria, viruses and waste, so everything it touched has to be treated as contaminated. Porous materials that soak it up cannot be cleaned to a safe standard, so they are removed, and the work is done with protection in place.
Clean water from a supply line can often be pumped out and dried in place. Sewage cannot, because the materials it reaches keep the contamination. Carpet, pad and drywall that soaked up sewage are removed, and hard surfaces are cleaned and then dried.
The water category is the reason for this. The crew assesses the water first, and it treats the area as contaminated until it has been cleaned and dried. That decision is explained to the owner on site.
Who is at risk in a room that had sewage?
Children, older adults, people with weakened immune systems and anyone with an open wound are most at risk around sewage. Anyone who has to enter the room should wear protection and keep the affected area closed off.
Keep these people out of the room until the crew has finished the first steps and has told you the area is safe to enter. Pets should be kept out too, because they can carry the contamination on their coats and paws.
If anyone develops a fever, vomiting, diarrhea or a skin wound that becomes red or swollen after contact with sewage, see a doctor and tell them about the exposure.
Should I try to clear the drain myself?
A household plunger may clear a simple blockage in a sink or a toilet, but it can push sewage back into the room, and it should not be used once the water is coming up through a floor drain. A blockage in the main line needs a drain service.
Using a plunger or a snake on a backing-up drain can splash contaminated water and waste onto you and the room. If the water is already in the room, stop and call the line. The crew stops the flow and removes the water safely.
A drain service is the right route for a main-line blockage. Ask the service to confirm the line is clear before the building is used again, and keep a record of the work it did.
What can I do to stop the damage spreading?
Stop using the toilets and drains that are backing up, close the room, and keep people and pets out. Photograph the area and the water before anything is moved, and write down the time you noticed the backup.
Closing the door and sealing the gap at the bottom with towels is a simple step that helps keep the contamination in one room. Do not sweep or scrub the water, because that spreads it. Keep a record of what was in the room, with photographs, so the list of losses is complete.
Once the crew arrives, follow its instructions on what to move and what to leave. The crew explains which items can be cleaned and which must be removed, and it keeps the record of each item.