Septic Tank Backing Up? Here's What to Do

First: Stop Running Water

Every gallon that goes down a drain right now has nowhere to go but back toward you. Pause laundry, dishes, and showers, then work through this page.

A septic backup is the system telling you it's full or blocked — wastewater is coming up the lowest drains in the house, usually a tub, shower, or floor drain, because it can't get through the tank or the drainfield. The good news: most backups are fixed the same day with a pump-out. The bad news: continuing to run water makes it worse by the minute. Call (806) 583-3554 and a licensed septic professional gets routed to you.

What a backup usually means

• The tank is full. The most common cause by far. Years of settled solids finally leave the incoming water no room. Fix: pump the tank. Usually same-day.
• A blocked inlet or outlet baffle. Solids, grease, or (in older systems) a collapsed baffle choke the tank's plumbing. Found and cleared when the tank is opened.
• A blocked line between house and tank. Roots, grease, or a bellied pipe. Distinguishable from a full tank once the tank is inspected — if the tank is at normal level but the house line is backing up, the line is the problem.
• A saturated or failed drainfield. The serious one. If the tank is pumped and fills again quickly, or the yard over the field is wet and odorous, the field isn't accepting water. Pumping buys time; the field needs evaluation.

Do this now

• Stop all non-essential water use — laundry and dishwashers off, short toilet use only.
• Keep people and pets away from any sewage — it's a health hazard, not just a mess.
• Don't flush chemical "openers" or additives. They don't clear a full tank and they can make the pump-out harsher to handle.
• If you know where the tank lids are, clear access — it saves time and sometimes money when the truck arrives.
• Call (806) 583-3554. Describe what's backing up and how fast; that determines urgency and what equipment comes.

Was it trying to warn you?

Backups rarely come from nowhere. Gurgling drains, slow flushing, sewage odor in the yard, and lush wet grass over the drainfield are the early-warning sequence — usually weeks or months before sewage reaches a tub. If you're reading this because of a warning sign and not an active backup, you're in the cheap-fix window: a routine pump-out now typically prevents the whole event.

After the pump-out

Ask the technician what the tank said. Sludge level, baffle condition, and how the drainfield takes water after pumping tell you whether this was simple neglect (pump every 3–5 years and you're fine) or the first sign of a field problem worth planning around. Honest answer either way — that's the point of the visit.