Toilet Overflowing: What to Do Right Now
Stop the water, then assess
Do this now
- Turn off the toilet's water at the small valve behind it, turning right until it stops.
- If the tank is still trying to fill, lift the lid and prop up the float so the fill valve stops.
- If water is also coming up in a tub, shower or floor drain, the problem is bigger than the toilet. Stop using water everywhere in the house, dishwasher and washer included, and treat it as a sewer backup.
- Keep kids and pets away and wear rubber gloves, rubber boots and goggles around anything sewage touched, then wash with soap and water afterward.
- Dry what got wet within 24 to 48 hours to prevent mold, and discard porous things a sewage overflow soaked.
Can you fix it yourself?
One toilet overflowing after a flush is usually a bowl or trap clog: a flange plunger and patience solve most of them. Keep the supply valve off until the bowl drains. If plunging fails twice, a toilet auger is the next honest step, and after that you're paying for either a drain machine or a plumber. If more than one fixture backs up at once, skip straight to the sewer backup page, because that's the main line, not the toilet.
When to call a pro
- More than one fixture is backing up
- The same toilet clogs again and again, which can mean a partial blockage or a failing flush
- Sewage reached flooring, baseboards or a finished ceiling below
- There are young kids, elderly folks or anyone immune-compromised in the house and sewage spread beyond the bathroom, since EPA's mold guidance says contaminated-water cleanup is a job for experienced pros
We're a referral directory, not a contractor; this button opens our request form.
What to ask the plumber
- Are you licensed in Georgia, and do you bring a drain machine and a camera?
- If it's a clog, will you camera the line afterward to show what caused it?
- What's the price difference between clearing from the toilet versus pulling the toilet?
- If you find roots or a broken lateral, what are my options and rough tiers?
Questions we hear
What can I flush?
Gwinnett's water utility says it plainly: only water, toilet paper and human waste. Wipes marketed as flushable often don't break apart, and the county's no-flush list runs from paper towels and feminine products to dental floss, kitty litter and grease. When in doubt, trash it.
My toilet runs constantly. Is that related?
Different problem, same room. A worn flapper can leak silently or make the toilet flush on its own; EPA's test is food coloring in the tank, and color in the bowl within 10 minutes means a leak. Gwinnett County puts a constantly running toilet at 200 gallons or more wasted per day, so fix it even though it won't flood anything.
Do I need to disinfect after an overflow?
For clean-water overflows, drying fast is the main job. If sewage was involved, wear waterproof gloves, boots and eye protection, discard soaked porous items, clean hard surfaces with detergent then a disinfectant used per its label, and never mix bleach with ammonia or other cleaners.
Sources
Every number and local fact above comes from one of these, read 2026/10. Spot something out of date? Tell us.
- Georgia Tech Housing and Residence Life: How do I turn off the water?
- Gwinnett County Department of Water Resources: Sewer Service Lateral Repair and Cleaning Policy (homeowner handout)
- CDC: Guidelines for Cleaning Safely After a Disaster
- U.S. EPA: A Brief Guide to Mold, Moisture and Your Home
- Indiana Department of Health: Homeowner Guidance on Cleaning Up After Residential Sanitary Sewer Backups
- Gwinnett County Department of Water Resources: What Not to Flush
- U.S. EPA WaterSense: Fix a Leak Week
- Gwinnett County Department of Water Resources: Leak Detection