# Septic Backing Up Into the House: What to Do Right Now | Alcovy Septic > Sewage backing up from a septic system? Stop all water use, stay out of it, and work out whether it's the tank or a house clog. Step-by-step first response. URL: https://septictankpumpinglawrenceville.com/guide/septic-backup-what-to-do/ 1. [Home](https://septictankpumpinglawrenceville.com/)/ 2. [Emergency Septic Pumping](https://septictankpumpinglawrenceville.com/emergency-septic-pumping/)/ 3. Septic Backing Up Into the House: What to Do Right Now Urgent Updated September 17, 2026 · 5 min read · By Alcovy Septic # Septic Backing Up Into the House — What Do I Do? The first eight minutes matter more than the next eight hours. Here's the order to do things in, and what not to touch. Quick answer Stop all water use immediately, keep people and pets away from the sewage, and don't pour drain chemicals in. Then check elevation: if only an upper-floor fixture is affected it's usually a house-line clog for a plumber, but if the lowest drain in the house is backing up, the tank or the line to it is blocked and needs a pumper today. [Alcovy Septic](https://septictankpumpinglawrenceville.com/) answers calls about septic backing up into the house at every hour, and the first thing worth saying is that the damage is usually still small at the moment you notice it. What makes it large is the next forty minutes of normal water use. Work through this in order. ## Do these six things first 1. **Stop all water use.** Every fixture, everyone in the house. Kill the dishwasher and washing machine mid-cycle if they’re running — a washer dumps 15 to 40 gallons in one go, straight into a system that has nowhere to put it. 2. **Keep people and pets out of the affected area.** [EPA guidance](https://www.epa.gov/septic/resolving-septic-system-malfunctions) is to avoid contact with sewage entirely; it carries pathogens, and cleanup calls for rubber gloves and face splash protection. 3. **Shut off power to anything the water has reached.** Don’t wade in to do it — use the breaker panel. 4. **Photograph everything before you touch it.** The high-water mark, the affected rooms, the date on your phone. That’s your insurance record. 5. **Work out whether it’s the tank or the house.** See the elevation test below. 6. **Call a pumper if the pattern points at the tank.** [Emergency septic pumping](https://septictankpumpinglawrenceville.com/emergency-septic-pumping/) exists for this, and after-hours calls carry a premium — [what emergency pumping costs](https://septictankpumpinglawrenceville.com/guide/emergency-septic-pumping-cost/) sets expectations first. ## Tank problem or house-line clog? Use elevation Gwinnett County’s [homeowner septic kit](https://www.gwinnettcounty.com/static/departments/water/pdf/Septic_Kit.pdf) gives the cleanest field test there is, and it costs nothing: - **If the backing-up drain is _not_ the lowest one** — the upstairs bathroom is flooding while everything on the ground floor runs fine — the blockage is almost certainly inside the house plumbing. That’s a plumber’s job, not a septic truck. - **If the backing-up drain _is_ the lowest one**, or the one closest to the tank, the problem is the septic system: the tank, its outlet, or the line to the field. The county goes one step further. With the lid uncovered and the inspection port open, the normal liquid level in a tank sits about a foot below the lid. If the level is at or below that, wastewater isn’t reaching the tank and the inlet line is clogged. If the level is **higher** than that, waste is getting in but effluent isn’t getting out, and the tank, the filter or the field is the problem. Do not climb into or lean over an open tank. The kit is explicit: tank gases can kill in minutes. ## What not to do - **Don’t pour anything down the drain.** Drain chemicals and “septic shock” products don’t clear a blocked outlet. Acids and solvents corrode concrete tanks and distribution boxes, and Georgia DPH’s stated position, quoted in the county kit, is that additives are not beneficial and can be detrimental. More on that in [do septic tank additives work](https://septictankpumpinglawrenceville.com/guide/septic-additives-vs-pumping/). - **Don’t use a household or shop vacuum on sewage** unless it’s rated for contaminated water and you’re in protective gear. Standard vacuums aerosolise what you’re trying to contain. - **Don’t have the line between the tank and the drain field jetted as a first move.** Gwinnett’s kit specifically says contractors should not jet that line — high pressure there drives solids into the trenches. [Line jetting](https://septictankpumpinglawrenceville.com/septic-line-jetting/) belongs on the house-to-tank line and the [difference between pumping, cleaning and jetting](https://septictankpumpinglawrenceville.com/guide/septic-pumping-vs-cleaning-vs-jetting/) is worth knowing before anyone quotes you. - **Don’t pump the tank if the ground is waterlogged** after days of rain. The [EPA warns](https://www.epa.gov/ground-water-and-drinking-water/septic-systems-what-do-after-flood) that an empty tank in saturated soil can float out of the ground and break its pipes. See [septic problems after heavy rain](https://septictankpumpinglawrenceville.com/guide/septic-problems-after-heavy-rain/). ## What the visit should actually do A backup call is a diagnosis, not just a pump-out. Expect the crew to open both lids, read the liquid level, check whether the outlet filter has blinded over — tanks installed after about 1997 usually have one, and a clogged filter causes backups in tanks that aren’t full — and check the inlet and outlet baffles before pumping both compartments. [Effluent filter cleaning](https://septictankpumpinglawrenceville.com/effluent-filter-cleaning/) alone resolves a fair share of these calls. The tell for a deeper problem is timing. Gwinnett’s kit puts it plainly: if the system backs up again within a couple of weeks of being pumped, the absorption field is the problem, not the tank. That moves you into [drain field repair](https://septictankpumpinglawrenceville.com/drain-field-repair/), and repairs in Gwinnett need a permit from Environmental Health — see [septic repair permits in Gwinnett](https://septictankpumpinglawrenceville.com/guide/septic-permit-repair-gwinnett/). ## Cleanup and paperwork Clean with a disinfectant product or a 10 percent bleach solution — one part bleach to nine parts water — as the county kit recommends, and have affected carpet steam cleaned or removed. Then document it: the dated invoice showing gallons removed, tank size and findings; photos taken before cleanup; and any repair permit or inspection report. Insurance is the reason. A standard homeowners policy generally doesn’t cover sewer and drain backup; the [Insurance Information Institute](https://www.iii.org/article/protect-your-house-from-sewer-backups) notes coverage is available separately from most providers for a nominal cost. If you carry that endorsement, the invoice and photos are what you’ll be asked for. If you don’t, now you know to add it. If nobody can find your tank, your [Gwinnett septic records](https://septictankpumpinglawrenceville.com/guide/gwinnett-county-septic-records/) will usually show the plat — the county has them back to 1959 — and a [riser](https://septictankpumpinglawrenceville.com/septic-tank-locating-and-risers/) means the next emergency starts with a lid in hand instead of a shovel. ## Bottom line Stop the water, stay out of the sewage, and use elevation to decide who to call. Lowest drain backing up means the tank; an upstairs-only backup means a plumber. Skip the chemicals, skip the shop vac, and don’t let anyone pump a tank sitting in saturated ground. Get gallons, tank size and findings on a dated receipt — it’s your evidence for insurance and your baseline for the next interval. Not sure which category you’re in? Run the [system assessment](https://septictankpumpinglawrenceville.com/tools/septic-system-assessment/) or [get in touch](https://septictankpumpinglawrenceville.com/contact/). Want a price range for your tank today? [Call (470) 299-0510](tel:+14702990510) Sources 1. [EPA — Resolving Septic System Malfunctions](https://www.epa.gov/septic/resolving-septic-system-malfunctions) 2. [EPA — Septic Systems, What to Do after the Flood](https://www.epa.gov/ground-water-and-drinking-water/septic-systems-what-do-after-flood) 3. [Gwinnett County — Homeowner's Guide to Septic System Maintenance (Septic Kit)](https://www.gwinnettcounty.com/static/departments/water/pdf/Septic_Kit.pdf) 4. [UGA Extension B1421 — A Beginner's Guide to Septic Systems](https://fieldreport.caes.uga.edu/publications/B1421/a-beginners-guide-to-septic-systems/) 5. [Insurance Information Institute — Protect your house from sewer backups](https://www.iii.org/article/protect-your-house-from-sewer-backups) 6. [Georgia DPH Rule 511-3-1-.05 — septic tank requirements](https://regulations.justia.com/states/georgia/department-511/chapter-511-3/subject-511-3-1/rule-511-3-1-05) Related service [Emergency Septic Pumping](https://septictankpumpinglawrenceville.com/emergency-septic-pumping/) Sewage backing up, alarm sounding or a soggy, smelling yard. A truck is dispatched day or night, weekends included. [(470) 299-0510](tel:+14702990510) More septic guides - [Signs Your Septic Tank Needs Pumping (and Which Ones Can't Wait)](https://septictankpumpinglawrenceville.com/guide/signs-septic-tank-needs-pumping/) - [Emergency Septic Pumping Cost (2026 Guide)](https://septictankpumpinglawrenceville.com/guide/emergency-septic-pumping-cost/) - [Septic Problems After Heavy Rain in Georgia](https://septictankpumpinglawrenceville.com/guide/septic-problems-after-heavy-rain/) - [How Often to Pump a Septic Tank in Georgia (2026)](https://septictankpumpinglawrenceville.com/guide/how-often-pump-septic-tank-georgia/) - [Septic Repair Permit in Gwinnett County](https://septictankpumpinglawrenceville.com/guide/septic-permit-repair-gwinnett/) FAQ ## Common _questions_ ### Can I keep using the toilets if I go easy on water? + No. When the tank or its outlet is blocked, every gallon you add has to go somewhere, and the lowest opening in the house is the path of least resistance. Stop the dishwasher and washing machine first, since they dump 15 to 40 gallons at once. Tell everyone in the house before you start diagnosing anything. ### Will drain cleaner or a septic shock treatment clear it? + No, and it makes the visit worse. Caustic and acid drain products don't move a blocked outlet line or a full tank, they damage concrete and baffles, and Georgia DPH's position is that additives are not beneficial to on-site systems and can be detrimental. Anything poured in still has to be pumped out and disposed of as septage. ### Is a sewage backup covered by homeowners insurance? + Usually not under the base policy. The Insurance Information Institute notes that backup coverage is sold separately and is available from most providers for a nominal cost, so check whether you carry a water or sewer backup endorsement before you clean anything up. Photograph the water line, the damage and the date, and keep the pumping invoice. Get a real number Skip the guesswork. Get your tank's price. Send your ZIP and what's going on. A dispatcher will call back within 15 minutes with a price range for your tank. Get a free septic pumping quote Two quick steps. A local dispatcher will call back within 15 minutes. Faster: call [(470) 299-0510](tel:+14702990510). We never share your details.