No. Clumping cat litter and used cat litter should never go in a home compost bin.
Why
Used cat litter can carry Toxoplasma parasites, which can harm people, especially pregnant women. Clay and silica litter doesn't break down either, and many litters are treated with chemicals.
Quick facts
| Carbon to nitrogen | Not applicable |
|---|---|
| Hot pile | Does not break down |
| Cold pile | Does not break down |
| Worm bin | No · Parasites can harm worms and contaminate finished compost. |
| Bokashi | No · Pathogens and cat waste are not suitable for bokashi. |
| City green bin | Not accepted in most municipal green bins |
| Prep | Do not compost; bag and throw in trash |
| Mix with | Do not mix into compost piles |
| Pest risk | High · Risk of spreading toxoplasmosis and attracting disease vectors. |
How to get rid of cat litter
- Bag used litter and throw it in the trash.
- Use a litter type made from paper, wood, or wheat if you prefer to reuse it.
- Scoop daily to keep the box clean.
Which types of cat litter can you compost?
- Clay litter: No. Traditional sodium bentonite clay does not break down and ruins finished compost texture.
- Silica crystal litter: No. These synthetic beads are non-biodegradable and persist indefinitely in the environment.
- Paper pellet litter: Sometimes. While paper is biodegradable, used pet waste paper still carries dangerous parasites unsuitable for home piles.
Watch out for
- Don't put cat poop in your food compost, even in small amounts.
- Don't use cat litter in a garden bed or on vegetables.
- Wash your hands after handling litter.
What to do instead
- Trash bagged used litter.
- Look for biodegradable litter that your city allows in green waste, and check the rules first.
Myths about composting cat litter
- Myth: Commercial composting facilities always accept all types of biodegradable cat litter. Truth: Many commercial facilities ban pet waste and alternative litters entirely due to pathogen concerns and contamination risks.
- Myth: Burying cat litter deep in the yard safely disposes of it without risks. Truth: Pathogens like Toxoplasma can persist in soil for years, contaminating nearby groundwater or infecting local wildlife and pets.
Can cat litter go in a green bin or recycling?
Most municipal green waste bins and yard waste programs strictly prohibit cat litter and pet waste because standard industrial composting processes may not reach the sustained high temperatures required to kill harmful pathogens. A few specialized municipal programs accept certified biodegradable litters, but you must check your local waste authority rules first. Always bag traditional used litter securely and place it directly into your household trash bin to protect sanitation workers and the environment.
Common questions
Can I compost cat poop?
No. It can carry Toxoplasma and other parasites that survive home composting.
Is biodegradable cat litter compostable?
Sometimes, but most home piles don't get hot enough to kill parasites. Trash it unless your city says otherwise.
Can I put cat litter on the garden?
No. Keep it out of vegetable beds.
Is cat litter biodegradable?
Clay and silica litter aren't. Paper or wood litter breaks down slowly but still shouldn't go in your home bin.
Rules vary by town and by composting method. When in doubt, check with your local composting or waste program.