What Should You Do During a Sewer Backup?

A sewer backup can expose people to contaminated water and damage property. Follow these immediate safety steps and share clear information when requesting urgent help.

Stop using water

Do not flush toilets, run showers, use sinks, or operate dishwashers and washing machines if the drainage system is backing up. Additional water can worsen the overflow. Tell everyone in the property to stop using affected plumbing until the cause is assessed.

Keep people away from wastewater

Treat sewage and wastewater as contaminated. Keep children and pets out of the area and avoid direct contact. Do not attempt to clean a substantial backup without appropriate protective equipment and guidance. If anyone has had significant exposure, seek suitable medical or public-health advice.

Be careful around electricity

If water is near outlets, appliances, extension cords, or electrical panels, stay away. Do not step into a wet area to unplug equipment. Contact the appropriate emergency professional if electrical hazards may be present.

Explain the backup clearly when calling

State that wastewater is backing up, identify where it appears, list the fixtures involved, and explain when it began. Mention whether water use has stopped and whether the issue has happened before. Ask whether an independent provider is available for urgent drain or sewer assessment.

Do not assume cleaning alone resolves contamination

Clearing a drain may stop additional wastewater from entering, but surfaces and materials already exposed may still require appropriate cleanup and sanitation. Follow relevant health and safety guidance for contaminated materials.

After the backup is controlled

Ask what caused the restriction, whether the line was fully cleared, and whether inspection is recommended. Keep records of the event and work performed. If the backup recurs, discuss the underlying cause rather than relying only on repeated emergency clearing.

Related information

For service-specific guidance, see clogged drain cleaning, main-line drain cleaning, hydro jetting, and drain camera inspection. The appropriate service depends on the actual symptoms and pipe condition.

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