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us Home & property emergencies multiple drains gurgling • gurgling drains whole house • toilet bubbling when sink runs • sewage smell in house • sewer gas smell indoors • rotten egg drain smell • slow drains everywhere • main sewer line blockage • sewer backup warning signs • basement drain backing up • shower drain gurgling • floor drain smells sewage • sewer odor after flushing • suspected sewage backup • municipal sewer backup • septic system backup signs • home smells like drains • plumbing vent issue smell • drain trap dried out smell

What to do if…
multiple drains start gurgling and your home smells like sewage

Short answer

Stop using water immediately and check the lowest drain/toilet for backup. If sewage is backing up or levels are rising, isolate the area and call a licensed plumber (and your municipality/utility if you suspect a municipal sewer backup).

Do not do these things

  • Don’t keep flushing, showering, or running water “to see if it clears” (this can drive more sewage into the home).
  • Don’t use chemical drain openers in multiple fixtures (often ineffective for main-line issues and can create hazardous splash/chemical burns).
  • Don’t wade into sewage water or let children/pets near it.
  • Don’t use electricity in wet/contaminated areas or touch outlets/panels with wet hands.
  • Don’t stay in an unventilated area if the odor is strong—move to fresh air.
  • Don’t ignore the possibility of natural gas if you’re unsure what you’re smelling. If there’s a very strong “rotten egg” odor near an appliance/meter, or you hear hissing, leave immediately and call 911 and/or your gas utility from outside.

What to do now

  1. Stop all water use right now. No toilets, faucets, showers, dishwasher, washing machine, or ice-maker water line use.
  2. Ventilate and limit exposure. Open windows/exterior doors if safe. Close off affected rooms; keep people and pets out.
  3. Check for an active backup (2 minutes).
    • Look at the lowest point (basement floor drain, lowest shower, downstairs toilet).
    • If you see rising water, bubbling, or waste, treat it as an active sewer/septic backup.
  4. Prevent it getting worse.
    • If someone might accidentally use plumbing, shut off the home’s main water valve.
    • If water is on the floor near outlets/appliances, turn off power to the affected area at the breaker panel only if you can do it safely from a dry location. If you can’t do this safely, keep people out and wait for professional help.
  5. Call the right help fast.
    • Licensed plumber/drain professional: tell them “multiple drains gurgling + sewage smell” and whether anything is backing up.
    • If you suspect the problem is in the municipal sewer (neighbors also affected, street manhole overflow, repeated backups): call your city/county sewer or public works “sewer emergency/after-hours” number (often listed on the utility bill or the city/county website).
    • If you have a septic system and gurgling/smells are widespread: call your septic service provider and keep all water use stopped.
    • If sewage is actively entering living space and you can’t reach the right utility contact quickly, call 911 for immediate safety help.
  6. If sewage entered the home, treat it as a health hazard.
    • Avoid direct contact; if contact happens, wash skin with soap and water.
    • Use protective gloves/boots/eye protection if you must enter briefly to shut valves or move pets.
  7. Document quickly for insurance/landlord (without spreading contamination). Take photos/video of affected fixtures/areas and note the time you first noticed symptoms.

What can wait

  • You don’t need to figure out whether it’s a venting issue, trap issue, or main-line blockage right now—act as if a backup could happen until a professional confirms otherwise.
  • You don’t need to start cleanup beyond basic isolation/ventilation until the source is fixed and water is no longer rising.
  • You don’t need to decide what to throw away today—focus on stopping flow, preventing exposure, and documenting damage.

Important reassurance

Multiple gurgling drains plus sewage odor is a common “system-level” warning sign. Stopping water use and calling the right service early is often what prevents a full backup and bigger contamination.

Scope note

This is first-step guidance only—meant to reduce harm and prevent escalation. Diagnosis, repairs, sanitation, and any claims are the next phase once the backup risk is controlled.

Important note

This is general information, not professional plumbing, medical, or legal advice. If sewage is actively entering living spaces or anyone feels unwell from fumes, prioritize fresh air and urgent professional help.

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