Eaux usées qui remontent ou débordent : que faire ?
Une remontée d’eaux usées est l’un des problèmes les plus éprouvants que vous puissiez rencontrer chez vous. C’est désagréable, stressant et il faut agir rapidement.
Ce guide vous aide à reconnaître les causes les plus fréquentes et à savoir quoi faire.
Quelle que soit la cause, nous pouvons vous aider à comprendre la situation et à trouver une solution.
Les eaux usées remontent dans une seule pièce
Si des eaux usées ou de l’eau sale remontent par une seule évacuation, mais que le reste de votre logement fonctionne normalement, le problème vient probablement de cette canalisation.
Les signes d’une canalisation bouchée :
- des eaux usées ou de l’eau sale remontent dans un seul WC, lavabo ou baignoire
- l’eau stagne ou s’écoule très lentement
- une forte odeur se dégage de l’équipement concerné
La cause la plus probable est une accumulation de graisses, de lingettes ou d’autres déchets. Le problème vient rarement du système d’assainissement lui-même.
What to do next
Sewage in your home is always a health risk, even when it's limited to one fixture.
Call a specialist as soon as possible. In most cases, professional drain jetting can quickly clear the blockage.
While you wait:
- avoid flushing, running taps, or using appliances connected to the drain
- keep children and pets away from the affected area until it's been cleared
- do not attempt to clean up sewage without protective gloves and clothing
You have sewage backing up in multiple rooms
If sewage or dirty water is rising in more than one room, the problem is no longer isolated to a single pipe.
Signs that point to a serious problem:
- sewage or dirty water rising in sinks, baths, or showers across multiple rooms
- toilets won't flush or flush very slowly throughout your house
- water rises in one fixture when another is used — for example, your toilet bubbles when the shower runs
- a strong sewage smell throughout your house
These symptoms usually mean the main outflow pipe from your property is blocked, or your tank is full and can no longer accept wastewater. Either way, sewage has nowhere to go.
What to do next
This is a serious health risk that needs immediate professional attention.
Call a service provider as soon as possible. The longer you wait, the worse the problem will get.
While you wait:
- stop using all water in your home — no flushing, no taps, no appliances
- keep children and pets away from any area where sewage has surfaced
- do not attempt to clean up sewage without protective clothing and gloves
Sewage is surfacing near your tank or drainage field
If you can see sewage or dirty water appearing on the ground near your septic tank or drainage field, your system can no longer contain or process the wastewater it's receiving.
Signs that point to an outdoor overflow:
- pooling or bubbling liquid near your septic tank or drainage field
- a strong sewage smell outdoors
- waterlogged or discoloured ground near your system
- unusually lush or fast-growing grass above your drainage field
This usually points to a tank that needs emptying or is overloaded, a cracked or broken pipe, or a failing drainage field.
What to do next
This is a health and environmental risk that needs immediate attention.
Call a specialist now. The sooner they can assess the situation, the sooner it can be contained and resolved.
While you wait:
- stop using all water in your home
- keep children and pets well away from the affected area
- do not attempt to cover or clear the affected area yourself
Dealing with something less urgent?
You don't need to wait for a sewage backup to get off-mains service. If something doesn't seem right with your system, we're here to help.
