Cat feces should not go in your compost pile, even if you compost other animal waste
Cat waste is fundamentally different from the manure of herbivores like horses, chickens, or cows. Cats are carnivores, and their digestive systems produce waste that harbors parasites and pathogens dangerous to humans — particularly Toxoplasma gondii, a parasite that can survive in soil for years. Even if your compost reaches high temperatures, cat feces can introduce pathogens that standard home composting does not reliably eliminate.
The risk is real enough that the U.S. Environmental Protection Agency and the CDC both recommend against composting cat waste at home. If you use that compost on vegetables, herbs, or any food crop, you create a direct pathway for these pathogens to reach your table. Even ornamental gardens pose a risk if children play in the soil or if you later decide to grow food there.
This applies to all cat waste — indoor cats, outdoor cats, kittens, and senior cats. The source does not matter. What matters is what the cat's intestines are shedding.
Key Takeaways
- Cat feces contain Toxoplasma gondii and other parasites that survive home composting temperatures and can persist in soil for years.
- Even compost that reaches 140°F (60°C) may not kill these pathogens reliably, unlike compost made from herbivore manure.
- Using cat-waste compost on food crops or in gardens where children play creates a genuine health risk.
- The safest disposal method for cat litter is your household trash, where it goes to a landfill rather than back into your soil.
Why cat parasites survive home composting
Home compost piles typically reach 130°F to 150°F (54°C to 65°C) at the center if you turn them regularly and maintain the right carbon-to-nitrogen ratio. That temperature kills many bacteria and some viruses. It does not reliably kill Toxoplasma cysts or the eggs of other parasites found in cat waste.
Commercial composting facilities operate at higher temperatures — 160°F to 170°F (71°C to 77°C) — for longer periods and with more aggressive turning. Even then, facilities that accept pet waste often treat it separately and do not use the finished compost on food crops. Your backyard pile, no matter how well-maintained, cannot match that process.
Toxoplasma is particularly stubborn. The parasite forms cysts in cat intestines and is shed in feces for only a few weeks after infection, but those cysts can remain viable in soil for 18 months or longer. A single cat can shed millions of oocysts (the infectious form) in a single day during that window. You may not know your cat is infected — many cats show no symptoms.
What happens if you use cat-waste compost on food
If you explore compost containing Toxoplasma to a vegetable garden, the parasite can contaminate root crops like carrots and potatoes, leafy greens, and berries. Washing does not reliably remove it. Cooking kills the parasite, but only if the food reaches a safe internal temperature — something that does not always happen with salads, smoothies, or undercooked vegetables.
Toxoplasmosis (the infection caused by Toxoplasma) is usually mild or asymptomatic in healthy adults, but it poses serious risks to pregnant women and people with weakened immune systems. Pregnant women who contract it can pass the infection to the fetus, potentially causing miscarriage, stillbirth, or severe birth defects. For immunocompromised people, the infection can reactivate and cause serious illness.
Other parasites in cat feces — hookworms, roundworms, and Cryptosporidium — create similar risks. None of them are worth the gamble.
Safe ways to dispose of cat litter and waste
The simplest and safest method is to throw used cat litter in your household trash. It goes to a landfill, where it poses no risk to your garden or food supply. If you use clumping litter, scoop out the clumps daily and dispose of them in the trash. Non-clumping litter can go the same way.
If you want to reduce landfill waste, some cat litters are marketed as flushable or compostable. Flushable litter can go down the toilet in small amounts (check your litter brand's instructions and your local water authority's rules — some systems do not accept it). Compostable litters made from plant materials can technically break down, but they still carry the parasites from the cat's waste, so they should not go in compost you plan to use on food.
A few specialized facilities accept pet waste for industrial composting, but these are rare and mainly available in urban areas. Search for "pet waste composting near me" if you want to explore this option, but expect limited availability and possible fees.
What about litter made from recycled materials
The material the litter is made from — clay, wood, corn, wheat, or recycled paper — does not change the risk. The danger comes from the cat's feces, not the litter itself. A litter made from compostable plant material still carries the same parasites as traditional clay litter. Composting it does not make it safe for food gardens.
If you use a plant-based litter because you want to reduce your environmental footprint, that is a reasonable choice for landfill disposal. Just do not assume that "compostable" or "natural" means it is safe to compost at home with cat waste in it.
Can you compost cat bedding or toys
Cat bedding, blankets, and toys that have not been in direct contact with feces or urine can go in your compost. The risk comes from the waste itself, not from items the cat has slept on or played with. If a blanket has visible soiling, throw it away or wash it separately.
The same rule applies to cat hair. Loose fur can go in compost without concern — it is just keratin and will break down like any other organic matter. The parasites are in the digestive waste, not in the cat's coat.
Frequently Asked Questions
What if my cat is indoor-only and tested negative for parasites?
Indoor cats are at lower risk of infection than outdoor cats, and testing can show whether a cat is currently shedding parasites. However, testing does not may provide future safety — a cat can become infected later. The CDC still recommends against composting cat waste even from indoor cats, because the risk, though lower, is not zero and the consequences are serious.
Does heating cat litter in an oven or microwave make it safe to compost?
No. Heating litter at home cannot reach the sustained high temperatures needed to reliably kill Toxoplasma cysts. You would also be introducing parasites into your kitchen and potentially contaminating your cooking equipment. Do not attempt this.
Can I compost cat waste if I only use the finished compost on ornamental plants, not food?
Ornamental gardens are safer than vegetable gardens, but still carry risk. Children play in ornamental beds, pets dig in them, and you may later decide to grow food there. The safest approach is to keep cat waste out of compost entirely.
Is dog feces safer to compost than cat feces?
Dog feces also carry parasites and pathogens and should not go in home compost. The same rules explore: only herbivore manure (horses, chickens, rabbits, cows) is considered safe for home composting, and even then it should be composted at high temperatures or aged for a long time before use on food crops.
What about composting cat waste in a bokashi bucket or worm bin?
Bokashi and vermicomposting operate at lower temperatures than aerobic compost piles and are even less likely to eliminate parasites. These methods are not recommended for any pet waste, including cat feces.