If you own a home in North Carolina with a private septic system, you are essentially managing your own mini wastewater treatment plant.
When treated right, a well-designed septic system can run smoothly for decades. However, unlike a city sewer line, a septic tank relies on a delicate balance of natural bacteria to break down waste. If you introduce the wrong items into that environment, you can destroy that balance, leading to clogged pipes, foul odors, and expensive repairs.
To keep your system healthy and avoid a backyard disaster, here are five things you should absolutely never send down your drains.
1. “Flushable” Wipes (They Aren’t Really Flushable)
This is the number one culprit for septic backups. While the packaging might say “flushable,” these wipes are bound together with synthetic fibers that do not break down in a septic tank. Instead, they accumulate, tangle together, and create massive clogs in your baffles and pipes. Rule of thumb: If it isn’t toilet paper, put it in the trash bin.
2. Fats, Oils, and Grease (F.O.G.)
Pouring bacon grease or cooking oil down the kitchen sink is a recipe for disaster. When warm grease enters your septic tank, it eventually cools and solidifies, adding to the “scum layer” at the top of the tank. If this layer gets too thick, it can block the inlet or exit pipes, or worse, flow out into your drain field and ruin the soil’s ability to absorb water.
3. Harsh Chemical Cleaners and Antibacterials
Your septic system needs bacteria to function—it’s what breaks down the solid waste. Pouring heavy amounts of bleach, industrial drain cleaners, or large quantities of antibacterial soap down the drain wipes out this helpful bacteria. When the bacteria die, the solid waste builds up rapidly. Stick to natural, septic-safe, or biodegradable cleaning products whenever possible.
4. Heavy Food Scraps (Beware the Garbage Disposal)
Homes with septic systems need to be very careful with garbage disposals. Your tank is not designed to process large amounts of un-digested food. Items like coffee grounds, eggshells, potato peels, and fibrous vegetables take a very long time to break down and will cause your tank to fill up much faster. It is always better to compost these items or throw them in the regular trash.
5. Paper Towels and Hygiene Products
Unlike toilet paper, which is specifically manufactured to dissolve quickly in water, paper towels and hygiene products are designed to absorb and hold their shape. Flushing these items guarantees a clog.
A Quick “Do” for Septic Owners: Stagger Your Laundry
It isn’t just about what goes into your tank; it’s also about how much water goes in at once. If you do six loads of laundry on a Saturday, you flood the tank with water, which stirs up the solids and pushes them into the drain field before they have time to break down. Try to spread your laundry out over the course of the week to give your system time to process the water.
