The Best Way to Dispose of Cat Litter

Tan cat litter box with litter and litter scoop

The Spruce / Ana Cadena

Similar to the old idiom of what goes up must come down, what goes in must come out. Perks of owning a cat can revolve around their independence and compulsion to be clean and live in a clean environment, however, even the cleanest cats need to use the facilities. Ask any cat owner and they will undoubtedly tell you that their least favorite chore related to caring for their feline is cleaning the litter box. It's a pain, it's smelly, and litter isn't exactly the lightest thing on the planet. It's also a necessary evil for any home with a happy cat. It begs the question: what is the best way to deal with a dirty litter box?

Put it in the Trash

This method is a tried and true method and the best way to dispose of your used cat litter. Litter boxes should be scooped at least once a day. Use a litter scoop to sift out urine clumps and stool and place in a small trash bag. Once all the boxes in your house are scooped, tie off the garbage bag in a knot. To prevent odor and bacterial leakage, double bag your scooped litter. Place in an outside trash can with a tight fitting lid. Be sure to use a heavier duty garbage bag because, again, litter, especially clay litter, is dense and can quickly get heavy.

Do not scoop cat litter into a trash can and then let it sit there. Not only can this get stinky after some time, bits of cat litter dust and contaminated cat feces can enter the air every time the can is opened. Also, never dump used cat litter outside.

If you live in a rural area you may have a burn pile or burn barrel for your trash. Clay litter, though, does not burn well. Instead, it will simply collect at the bottom of your pile. Some biodegradable litters may be burnable, but there is always a possibility of toxins that can become airborne in the process.

Cat litter urine clumps wrapped in plastic bag and placed in blue trash bin

The Spruce / Ana Cadena

Aren't Some Litters Compostable?

The very first compostable litter was actually a type of clay called Fuller's clay. American businessman Ed Lowe realized that since this clay is able to absorb its weight in water, it would make a great substrate for cat's to do their business in. Since Lowe's original eureka moment in 1947, a variety of different materials are used for different kinds of cat litter. Clay is no longer the only option. There are different biodegradable substrates, from compressed paper to corn to wheat. Some sources like these biodegradable options because, since they are biodegradable, they can be composted. However, there are real concerns I have with this.

Cat feces can carry things a lot scarier than bacteria like E. coli. Cats that are infected by the protozoal parasite Toxoplasma gondii readily shed this parasite in their stool. Once shed into the environment, it can easily infect other animals and people as well. Some sources say that composting biodegradable cat litter for use in flower gardens only, never vegetable, is fine, it's not recommended to be so cavalier about something that could be a potential pathogen.


Toxoplasmosis doesn't cause clinical symptoms in most healthy adults, but if a woman contracts it while she is pregnant, the parasite can cause complications to the fetus.

What About Flushing?

Clay-based litters are not flushable. The clay can wreak havoc on your plumbing. Some biodegradable litters, though, purport to be flushable on the packaging. Should you flush used cat litter, though? Flushing urine clumps is one thing, but it's not recommended to flush stool. This is for the same reason that it's not recommended to compost used cat litter. Even with modern waste water treatment systems, T. gondii and other intestinal parasites are often not caught and can stay in the water supply.

Cat litter itself may have come a long way since its humble beginnings in 1947 from non clumping to clumping, unscented to scented, and clay to biodegradable. Picking the right litter for your cat can be overwhelming (your cat will let you know if they like their litter or not based on how reliably they use it and how much they dig in it). Knowing what the best thing to do with your used cat litter, though, has remained the same for centuries. No need to over complicate it; used cat litter goes in the garbage.

Blue cat litter scoop over toilet bowl

The Spruce / Ana Cadena