Everything that goes down a drain ends up in your tank. If it doesn't fall apart in water the way toilet paper does, it either snags somewhere or sits there until the next pump-out.
Only human waste and toilet paper belong in the toilet. Wipes labeled flushable, paper towels, feminine products, diapers, floss, and cat litter go in the trash. Keep grease, coffee grounds, and food scraps out of sinks, and never pour paint, solvents, pesticides, or medicine down any drain. Normal cleaners at label amounts are fine.
Two columns, no hedging. The sections below explain the ones that need more than a line.
| Item | Verdict |
|---|---|
| Regular toilet paper, any brand | Flush it. A septic-safe label is fine but not needed. |
| "Flushable" wipes | Trash. Baby, cleaning, and makeup wipes too. |
| Paper towels and tissues | Trash. They're made to stay strong when wet. |
| Tampons, pads, condoms, diapers | Trash, every time |
| Dental floss, cotton swabs, hair | Trash. Floss and hair wrap around pumps and floats. |
| Cat litter, including "flushable" litter | Bag it and trash it |
| Cooking grease, oil, and fat | Cool it in a can and trash it |
| Coffee grounds and eggshells | Trash or compost |
| Garbage disposal scraps | Light use is OK. Scrape plates first. |
| Bleach, detergent, toilet cleaner | Fine at the dose on the label |
| Strong acid or lye drain openers | Avoid. Use a plunger or snake. |
| Septic additives, enzymes, yeast | Skip. They don't replace pumping. |
| Prescription and over-the-counter drugs | Drug take-back box |
| Paint, solvents, fuel, motor oil, pesticides | Never down a drain. See the Maury County drop-off table. |
The toilet is where most septic damage starts, because it's the drain people treat like a trash can. The rule is short: human waste and toilet paper. Everything else from the bathroom goes in a lidded bin by the toilet, and that includes tampons and applicators, pads, condoms, diapers, floss, cotton swabs, hair, and cigarette butts.
None of those break down in a tank. They add plastic and fiber that float in the scum layer or sink into the sludge, and stringy items like floss and hair are the worst for pump systems because they wind around moving parts.
Cat litter belongs here too, even the brands sold as flushable. Clay and grit settle straight to the bottom of the tank as sludge that only a pump truck removes.
They aren't, and the label doesn't change that. Toilet paper is made to come apart the moment it's soaked. A wipe is made to stay strong while you use it, and that strength goes down the pipe with it.
A wipe can clear the bowl and still snag 40 feet away at a pipe joint, the tank inlet, the effluent filter (a screen on the tank outlet that keeps solids out of the drainfield), or a pump. Pump and pressure systems, which many Maury County lots with shallow soil need, have small openings that wipes can wrap or plug.
If wipes have been going down for months, stop now and mention it at your next pumping so the pumper checks the filter and inlet. Call sooner if drains slow or an alarm sounds.
Bacon grease, cooking oil, butter, and fat trimmings float and build the scum layer. Enough of it can plug the tank outlet and coat the soil in the drainfield. Pour it into a can, let it set, and throw it away. Wipe greasy pans with a paper towel before washing.
Grounds, eggshells, rice, and peelings don't break down in the tank. They settle into the sludge layer and shorten the time between pump-outs.
Normal dishwasher loads and dish detergent at the label dose are fine. Running loads back to back on a laundry day is the bigger risk, because the field gets a lot of water at once.
You can have one, but treat it as a convenience for scraps you couldn't scrape off, and stay away from a habit of feeding it whole plates. A disposal grinds food smaller. The same amount still lands in the tank, and EPA advises limiting disposal use because the extra solids can mean pumping more often.
Scrape plates into the trash or compost and keep a strainer in the sink. If you use the disposal a lot anyway, tell your pumper and ask for sludge and scum measurements at each visit. That tells you exactly how much sooner you need to pump instead of guessing.
A home food business, catering, or a home daycare is a different case. It can send more solids and water than the permit was sized for, so ask TDEC to look at the use before it becomes a drainfield problem.
The tank's bacteria handle a normal household's cleaning without trouble. Problems come from constant disinfecting, bulk dumping, and harsh drain products.
| Product | Fine to use | Avoid |
|---|---|---|
| Laundry and dish detergent | The dose on the label | Extra detergent and five loads back to back |
| Bleach and disinfectant | Normal cleaning in label amounts | Every-flush bleach tablets and pouring out bulk bleach |
| Toilet bowl cleaner | Occasional cleaning as directed | Automatic in-tank tablets |
| Drain cleaner | A plunger or drain snake | Strong acid or lye openers, which can damage pipes, burn skin, and leave the real clog in place |
| Soap and shampoo | Everyday bathing and handwashing | Dumping expired bulk containers |
| "Septic safe" products | Using them in normal amounts | Assuming the label means you can use more |
Never mix bleach with ammonia, acids, or drain openers. The gas it makes is a danger to you long before it's a septic problem.
No. EPA says routine septic additives generally aren't needed, and some chemical additives can harm the system or groundwater.
| What the box claims | What actually happens | Do this instead |
|---|---|---|
| Adds the bacteria your tank needs | Household wastewater already brings plenty of bacteria | Use the system normally and keep chemicals out |
| Means you don't need to pump | Nothing dissolves the settled solids a truck removes | Measure sludge and scum and pump on schedule |
| Dissolves grease and sludge | Loosened solids can move out to the filter and field | Keep grease out and pump the tank fully |
| Fixes a failing drainfield | A product can't repair pipe, soil, or compaction | Find the real cause and follow TDEC's repair process |
Paint, thinner, solvents, fuel, antifreeze, motor oil, pesticides, and weed killer should never go down a sink, tub, or toilet. They can kill the bacteria that do the tank's work, and they don't stop at the tank. Whatever stays liquid rides the effluent (the settled liquid leaving the tank) out into the drainfield, and where Maury County's soil is thin over fractured limestone, there's less soil between that drainfield and the groundwater that wells draw from.
Clean water is the other thing the system doesn't want. Roof drains, sump pumps, and pool or hot-tub water don't need treatment, and piping them into the tank or across the field floods soil that should be soaking up wastewater. Route them away from the system.
Often it can. The University of Minnesota's research summary found that efficient, demand-based softeners have limited effect on the tank. Older timer units that regenerate too often push a lot of water through at once, which can stir up solids. Iron-filter backwash adds solids too, and the salt eventually reaches groundwater.
Before you reroute a discharge line to the yard, check with TDEC. A new outlet can erode soil, cross a property line, or land too close to a well. The easiest fix is usually setting the softener to regenerate only when it needs to.
| What you're getting rid of | Where it goes | Good to know |
|---|---|---|
| Old medicine | A permanent drug take-back box | Tennessee's Count It, Lock It, Drop It program maps drop-off spots, such as pharmacies and law enforcement offices |
| Pesticides, solvents, cleaning fluids, pool chemicals | TDEC's free mobile household hazardous waste collection at the Maury County Solid Waste Department, 1233 Lawson White Dr., Columbia | TDEC's mobile collection stops there periodically, most recently in September 2025; check TDEC's household hazardous waste schedule for the next date. No appointment or fee. It doesn't take paint. |
| Lead and lithium batteries | Any of Maury County's nine convenience centers | Free of charge |
| Used motor oil | Not the convenience centers | Maury County Solid Waste lists a used oil hotline at 800-287-9013 |
| Paint | Not the convenience centers or the mobile collection | Check the county Solid Waste page for current paint rules. Spring Hill has its own paint disposal sheet. |
Open: Maury County Solid Waste · TDEC HHW collection notice · Count It, Lock It, Drop It · Spring Hill paint disposal
About our sources. Maury Septic uses the sources listed below, including EPA septic care guidance and Maury County disposal options. Follow the links for the underlying rules, fees, and guidance.
U.S. Environmental Protection Agency
Failure signs, maintenance, pumping, water use, and drainfield protection.
U.S. Environmental Protection Agency
Current federal guidance on failure signs, water conservation, sewage-contact safety, professional diagnosis, and inspections of pumps, controls, wiring, tanks, and drainfields.
University of Minnesota Water Resources Center
Research summary explaining efficient versus timer-based softeners, regeneration volume, chloride, iron-filter backwash, system sizing, and the need for locally approved discharge decisions.
Tennessee Secretary of State
Official current chapter text governing Tennessee subsurface sewage disposal systems.
Tennessee Department of Environment and Conservation
Environmental field-office routing for septic-system questions and applications.
One wipe isn't worth a service call on its own. Watch for slow drains, gurgling, or an alarm over the next few weeks. The damage comes from wipes going down week after week.
Normal cleaning with bleach at the label dose is fine. The trouble is steady dosing: in-tank tablets that release bleach every flush, or pouring out a jug at once.
A small camper load now and then is usually workable if the holding-tank treatment is labeled safe for septic systems. Read that label before you dump; if it doesn't say septic safe, empty the tank at an RV dump station instead. Empty it slowly through the house sewer cleanout, and skip laundry that day so the field isn't hit with extra water.
Any ordinary toilet paper works, because it's made to fall apart in water. Septic-safe labels are fine to buy but don't add much.
Take it to a drug take-back box, often at a pharmacy or law enforcement office; Tennessee's Count It, Lock It, Drop It program maps them. TDEC's free mobile hazardous waste collection in Columbia has also accepted medications.
Send us what went down the drain, roughly how much and when, which fixtures are slow, and your system type. We'll pass it to a licensed installer near you if one is available to take it. For fumes, fire, or chemical exposure, call 911 or Poison Control first.
Related: maintenance hub · pumping frequency · how septic systems work · signs of septic failure · drainfield failure · backup response
Keep your permit, system sketch, and service records together. They help the next professional understand your property.