Is it OK to flush toilet paper in a septic tank?

Author: Dr. Lucius Friesen I  |  Last update: Saturday, June 27, 2026

Septic system failure can contaminate groundwater and surface water and lead to costly repairs for the homeowner. Only human waste and toilet paper should be flushed down the toilet.

What happens if you flush toilet paper in a septic tank?

The toilet paper you flush into your septic tank and other solids sinks to the bottom of the tank. Over time, a layer of sludge builds up. While naturally occurring bacteria will decompose that sludge, it doesn't happen as fast as the sludge layer grows.

How long does it take toilet paper to break down in a septic tank?

If you purchase toilet paper that is labeled septic safe it should dissolve completely within 20 minutes. You can test this yourself by taking your septic-safe toilet paper brand and scrunching it into a cup of water.

What toilet paper is not safe for septic tanks?

Thick, Multi-Ply Toilet Paper

Those luxuriously soft, multi-ply toilet papers might feel amazing, but they are often the biggest culprits when it comes to septic system problems. Those plush, multi-ply sheets might offer a gentle touch, but they come with a hefty price.

Can too much toilet paper clog a septic system?

Overfilling. Flushing too much toilet paper down the toilet can also overload the septic system and cause it to fill up more quickly than it can handle. This can lead to an overflow of sewage and other materials, which can be hazardous to human health and the environment.

can you flush toilet paper in septic tank

What gets rid of toilet paper in septic tank?

Septic systems rely on bacteria inside the tank that works to break down toilet paper and solid waste. As the solids get broken down, they are transformed into sludge that settles at the very bottom of the tank.

How often should you pump your septic tank?

Household septic tanks are typically pumped every three to five years. Alternative systems with electrical float switches, pumps, or mechanical components should be inspected more often, generally once a year. A service contract is important since alternative systems have mechanized parts.

Why is Charmin bad for septic tanks?

Yes. Charmin is septic safe and thoroughly tested to ensure it will settle in a septic tank and then undergo biodegradation in the tank.

What should you not put in a septic tank?

Do not put cigarette butts, paper towels, sanitary tampons, condoms, disposable diapers, anything plastic or similar non-biodegradables into a septic tank system. Avoid washing food scraps, coffee grinds, and other food items down the drain. Avoid using a garburator to dispose of kitchen wastes.

What is the safest toilet bowl cleaner for septic tanks?

Blueland Toilet Bowl Cleaner tablets are septic-safe! These tablets are 100% bio-based and made without chlorine bleach, hydrochloric acid or cetrimonium chloride (CTAC).

What is the best thing to put in your septic tank to keep it clean?

Use a Septic System Additive

Waste & Grease Eco-Friendly Digestant makes it easy to maintain a clean and sanitized home environment as well as a healthy bacteria population in your septic tank. Monthly use of Waste & Grease Eco-Friendly Digestant will help reduce surface and bottom solids in the septic tank.

Which brand of toilet paper is best for septic tanks?

Cottonelle UltraComfortcare is clog-free, septic-safe, and sewer-safe. Cottonelle uses renewable plant-based fibers, which makes this toilet paper biodegradable and great for your septic system. They do not contain any harsh ingredients or chemicals, so should not disrupt the delicate balance in your septic system.

How long does it take for poop to decompose in a septic tank?

On average, it takes anywhere from three to five years for waste to fully decompose in a septic tank. The decomposition time for waste in a septic tank can vary based on several factors, including the tank's size, the number of occupants in the household, and the types of waste introduced.

What can ruin a septic system?

It may surprise you, but grease and oil can spoil a septic system by clogging up the drain field and polluting the surrounding soil. Polluted soil cannot absorb and process liquids from your system. You could have to replace your septic tank system if you incur serious issues.

How do I know if my toilet paper is septic safe?

Find a medium-sized glass jar and fill it with 3/4 tap water. Add 6-8 sheets of toilet paper. Seal the jar and shake it vigorously for 10 seconds. If, after shaking, the paper has broken down fully, it is considered to be safe for most any well-maintained septic tank or plumbing system.

What is the best laundry detergent for septic systems?

After doing some research with septic system companies, including Wind River Environmental, these are the best detergents for septic systems:
  • Ecover Laundry Products.
  • Planet Laundry Products.
  • Mrs. ...
  • Mountain Green Ultra Laundry Liquid.
  • Seventh Generation Laundry Products.
  • Ultra Citra-Suds Natural Laundry Detergent.

Is Dawn dish soap safe for septic systems?

Yes, Dawn dish soap is generally safe for septic systems. It's got quite a reputation for being septic-friendly, and for good reason. As long as you're not going overboard with it, Dawn isn't likely to mess with the bacteria in your septic tank.

What are the signs that your septic tank is full?

How can you tell if your septic tank is full?
  • You have trouble flushing your toilet, or it's constantly backing up. ...
  • Your pipes make a gurgling sound or drain very slowly. ...
  • Your lawn is suddenly growing lush, green grass. ...
  • Water starts to pool in your yard. ...
  • Your home or yard smells like… well, sewage.

How do I keep good bacteria in my septic tank?

Septic Tank Bacteria – Tips to Keeping Your System Healthy
  1. Be Mindful of Household Chemicals. The types of chemicals used in your household help you eliminate bacteria in your home — and the septic tank bacteria. ...
  2. Regular Pumping and Inspection. ...
  3. Water Conservation. ...
  4. Proper Waste Disposal. ...
  5. Add Bacterial Supplements.

How do you keep toilet paper from clogging your septic tank?

The truth is toilet paper is designed to be flushed, and there is no evidence that your septic tanks will have any difficulty filtering out standard toilet paper. You may continue to buy your favorite toilet paper and flush it with impunity, provided you don't try to flush too much all at once.

Which toilet paper dissolves fastest?

The purer the pulp, the quicker it dissolves. Bamboo: An eco-friendly option, bamboo-based toilet papers tend to break down faster than their wood pulp counterparts, making them a top choice for the environmentally conscious and those with older plumbing systems.

What happens if you use regular toilet paper in a septic tank?

Toilet Paper – should be single-ply toilet paper because it breaks down in the septic system faster and better than higher ply count toilet paper. Use toilet paper labeled biodegradable, recycled or septic-safe.

Can a septic tank go 20 years without being pumped?

In general, a septic tank should be inspected every 1 to 3 years and pumped every 3 to 5 years.

How much does it cost to have your septic pumped?

The average cost to pump a septic tank is $423, with most people paying between $289 and $557. Septic tank pumping isn't the most glamorous task, but it's one that you should definitely stay on top of every three to five years to keep your system working properly and avoid an unsightly (and smelly) mess in your yard.

What time of year is best to empty a septic tank?

Spring: Spring is an excellent time for septic tank pumping. As the ground thaws and snow melts, accessing and servicing your system becomes easier. This season also prepares your septic tank for increased usage during the summer months.

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