Sewage Backflow in House: Safe Cleanup Steps After Rain
If sewage has come up through a drain or toilet, keep children, pets and elderly people out, wear gloves, boots and a mask, wash hard surfaces with soap and water, and throw away soaked porous things. Never mix cleaners.
In brief
- Who stays out: children, pets, pregnant women, elderly and sick people.
- Wear: rubber gloves, boots, a mask and eye cover if splashing.
- Clean: hard floors and tiles with detergent and water, then dry.
- Discard: soaked mattresses, rugs, cardboard, sponges and similar.
- After: wash hands with soap and clean water before touching food.
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Can sewage in the house make you sick?
Yes. Sewage carries the germs behind diarrhoea, typhoid, hepatitis A and skin and eye infections. The risk comes from contact with hands, mouth, eyes and broken skin, so cleaning is about breaking that chain, not about making the room smell nice. Spills from a septic tank are similar, plus they may release foul gases, so ventilate well.
What do you do first when drain water enters the house?
- Get people out. Move children, pets and the unwell to a clean room or a relative’s home.
- Switch off power to wet areas if water is near sockets and you can reach the mains dry. If not, wait for an electrician.
- Open windows and doors for air.
- Stop the source. Do not flush toilets or run taps into blocked drains. Call the municipality or a plumber for the blockage.
- Suit up: gloves, boots, mask, old clothes.
Floods also bring this problem, so the wider return-home checks are in returning home after a flood, which this page does not repeat.
How do you clean a floor after sewage?
- Remove solids with a shovel or old cardboard into a heavy bag. Do not use your hands.
- Mop up liquid and wring into the toilet, not into the garden or kitchen sink.
- Scrub with detergent and clean water. Soap and scrubbing remove most germs.
- Disinfect hard surfaces if you wish, using diluted bleach correctly as in how to dilute bleach with exact ratios. Detergent comes first, since bleach works poorly on dirt.
- Rinse and dry fully with open windows or a fan.
- Wash tools and boots, then your hands and forearms.
Insider trick: one product at a time
Never mix bleach with vinegar or other cleaners, because mixing can release harmful fumes. Use one product at a time with windows open, rinse in between, and keep the door open to the outside until the smell has cleared.
What should you throw away after sewage?
Hard, non porous things (tiles, plastic, steel, glazed pots) can be washed and disinfected. Porous and soft things soak sewage up and are almost impossible to make safe. As a rule, discard soaked mattresses, rugs, cushions, carpets, cardboard boxes, plywood, toys that cannot be scrubbed and food kept in the area. Wash clothes and bedding that can take it in hot soapy water, separately. Food that touched sewage, even in packs without a seal, goes in the bin.
Septic tank overflow: extra points
Keep people away from the soak pit area, fence it, and call someone to pump the tank. Do not grow or pick vegetables from the soaked patch until it has dried and the problem is fixed. Do not enter a tank or manhole yourself: the gases inside can overcome a person within moments.
Hygiene afterwards
Wash hands with soap and clean water for the length of a song before eating, feeding a baby or touching your face. Cover cuts with waterproof plasters. Bathe, change clothes and keep work boots outside. Flood relief camp tips on rashes and diarrhoea are in diarrhoea and skin rashes in relief camps, and jaundice signs are in hepatitis A and E.
Protect the kitchen and food
If sewage reached the kitchen, treat everything in reach as contaminated. Throw away open food, spices that sat in the spill and anything in cardboard or paper. Sealed tins and jars can be kept if you scrub them with soap and clean water and rinse them well. Wash pots, pans and cutlery in hot soapy water and give them a final rinse with treated water, boiling for drinking as in how long to boil drinking water in barsaat. Wipe the fridge handle, taps and door knobs, since hands touch them all day.
Preventing a repeat
Ask the municipality or a plumber to clear blocked lines before the next heavy rain. Keep drain covers in place, do not throw cloth, plastic or oil down toilets and sinks, and keep drain gutters around the house clear of leaves. If your area floods the drains often, a non return valve on the sewer line is worth discussing with a plumber. Keep a pair of gloves, boots and a bag of detergent where you can reach them, so the next cleanup starts quickly and safely.
Seek medical care the same day for diarrhoea or vomiting lasting over a day, blood in stool, fever, dehydration signs, yellow eyes or skin, a cut that turns red, hot or swollen, or sore, red, discharging eyes after a splash. Young children, pregnant women and older people should be seen sooner. If someone feels dizzy, faint or confused near a septic tank or closed drain, get them into fresh air and call your local emergency number (1122 in Pakistan, 112 in India). Stay out of the space yourself.
Questions people ask about sewage in the house
Is sewage water in the house a health risk?
Yes. It carries germs that cause diarrhoea, typhoid, hepatitis and skin or eye infections, mainly through hands, mouth, eyes and cuts.
How do I clean a sewage backup?
Wear gloves, boots and a mask, remove solids, scrub with detergent and clean water, rinse, dry well and wash your hands afterward.
How to clean after a toilet overflow?
Same method: protect yourself, remove and bag solids, scrub hard surfaces with detergent, dry and wash hands. Keep children out until it is dry.
Drain water entered the house, what should I do?
Keep people and pets out, open windows, turn off power if safely possible, stop using toilets, call a plumber or the municipality and then clean with protection.
Can sewage water make you sick?
Yes, especially if it gets in your mouth or eyes or on broken skin. Hand washing and gear lower the risk a great deal.
Is a septic tank overflow dangerous?
Yes, for both germs and gases. Keep away, fence the area, and have it pumped by trained workers. Never climb in.
What to throw away after sewage?
Soaked mattresses, rugs, carpets, cardboard, soft toys and food. Hard surfaces can be washed and kept.
How should I clean the floor after sewage?
Detergent and water first, then a correct bleach dilution if desired, rinse and dry. Do not mix bleach with other cleaners.
Can I mix bleach and vinegar to clean sewage?
No. Mixing can release dangerous fumes. Use one product at a time with ventilation.
More in Barsaat and Flood Season.
Sources
- CDC, Floods safety: https://www.cdc.gov/floods/safety/index.html