Can you compost dog poop? What the USDA actually says

Short answer: not in your regular compost pile, and never on food plants. Dog waste can be composted in a separate, carefully managed hot pile — the USDA has a guide for exactly that — but the guide was built around sled-dog kennels, it needs heat most single-dog households can’t produce, and even its authors keep the finished compost off vegetables. Below is what the public sources say, what they leave unresolved, and a practical way to decide. If you want the evidence on why pickup matters at all, start with Is dog poop bad for the environment?

Why your normal compost bin is the wrong place

Extension services are unusually blunt about this. University of Maine Cooperative Extension: “Never use cat, dog, or pig manure in vegetable gardens or compost piles.” University of New Hampshire Extension says the same and gives the reason: these manures are more likely than others to contain parasites that infect humans. Oregon State University Extension’s home composting guide says not to compost pet waste near vegetable gardens, water supplies, or streams.

The parasite that keeps coming up is the dog roundworm, Toxocara canis. According to the Companion Animal Parasite Council, its eggs need 2 to 4 weeks in the environment to become infective — usually after the visible poop has broken down — and then stay infective for years. A cool backyard pile is close to an ideal incubator: damp, sheltered, and later spread exactly where people kneel and dig.

Cow or horse manure from a farm is a different material with different rules. Dog waste is closer to a public-health item than a fertilizer, which is how the sources treat it.

Heat is the whole game

Composting kills pathogens with heat, and only if all of the material gets hot enough for long enough. The numbers in the public guidance:

Source	Temperature target	Context
USDA NRCS / Fairbanks SWCD dog-waste guide	145°F (63°C) for several days	“Compost must reach 145ºF for several days to destroy pathogens.” Fresh piles can spike above 160°F.
UF/IFAS Extension, Sarasota County	At least 140°F (60°C)	Calls 140°F the “magic number”; below it, you may not kill pathogens in dog waste.
U.S. EPA sewage sludge rule (40 CFR Part 503, Appendix B)	55°C (131°F) for 3 days in vessels or aerated piles; 15+ days with at least 5 turnings in windrows	Not written for dog waste — included for scale: this is what regulators require of a managed facility handling human sewage sludge.

The hard part is not the peak; it is the edges. The cool outer layer of a pile never gets there on its own, which is why the USDA method insists on turning the pile outside-to-inside every time the center temperature drops.

And here is the honest gap: UF/IFAS notes that the USDA researchers were not sure the process gets hot enough to kill Toxocara canis, one of the most heat-resistant pathogens in dog manure. They could not test it, because the participating mushers controlled roundworm so well that no infected samples turned up. Nobody in these sources claims home-composted dog waste is proven roundworm-free.

The USDA method, condensed

The guide, Composting Dog Waste (USDA NRCS and the Fairbanks Soil and Water Conservation District, December 2005), grew out of a 1991 study with Alaska dog kennel operators. Its core recipe:

A dedicated bin, ideally two — one collecting while the other composts. Pick a sunny, dry spot away from pregnant or nursing dogs and where runoff won’t flow into the dog yard.
Two shovels of dog waste to one shovel of sawdust (fine sawdust worked best; straw, leaves, or shredded newspaper are alternatives). Never sawdust from pressure-treated wood, per UF/IFAS.
Water until it’s as moist as a wrung-out sponge, fill to two or three feet deep, then stop adding fresh material and cover it.
A long-stemmed thermometer, read daily in several spots near the center, with a written log.
Turn when the temperature starts to fall — usually around two weeks — moving the outside to the center. Repeat until turning no longer reheats it. Cooking takes roughly 6 to 8 weeks.
Cure for several months, or even a year, before use.
Use it on ornamentals only: revegetation, lawn establishment, flower beds (about a 25% blend in beds or potting mix). Not on crops grown for people to eat.

Two details matter for ordinary owners. First, the guide says it takes at least 10 dogs, preferably 20, to generate enough waste to keep a bin going, and a 3-to-5-foot pile to hold heat. With fewer dogs, it suggests a separate bin bulked up with grass clippings or other nitrogen sources. Second, the study covered dog waste only. The authors do not recommend adding cat waste or cat litter, because cats can carry parasites harmful to a human fetus.

Our read: for a one- or two-dog household, hitting and holding 145°F through the whole pile is a real project, not a side habit. If you don’t own a compost thermometer and won’t log temperatures, you are doing cold composting, and the heat-based safety case doesn’t apply.

Pet-waste digesters and worm bins

A buried pet-waste digester (a perforated can or bin sunk into the ground) is a disposal method, not a compost source. Oregon State Extension describes a backyard anaerobic digester as useful for pet waste but says the result “is not safe for harvesting and should not be used,” and to keep it away from vegetable gardens, water supplies, and streams. In heavy clay, high water tables, or frozen ground, check the maker’s instructions and your local extension office before digging.

Worm bins come up a lot online. We did not find extension guidance endorsing them for dog waste, and they work at room temperature by design, so they don’t provide the heat step the USDA method depends on. Treat any worm-bin output the same way: never on food plants.

The easiest “compost” may be your city’s bin — or the trash

Municipal rules vary widely, and the difference changes which bag you should buy.

Toronto accepts it. The City of Toronto’s Green Bin takes pet waste, including dog droppings, and it has Green Bins in all of its dog off-leash areas. Toronto processes organics with anaerobic digestion, captures the biogas, and turns digester solids into compost. The twist: during pre-processing, anything that behaves like plastic — including compostable bags — is removed and sent to landfill. The city says any plastic bag is fine and compostable bags are not necessary.
Seattle does not. Seattle Public Utilities says pet waste always goes in the trash “regardless of what kind of bag is used,” calls pet waste “a leading source of contamination in the compost stream,” and suggests bags that are not brown or green so nobody mistakes them for compost. It says bags with at least 65% post-consumer recycled content beat all-new plastic, and that dog poop (without the bag) can be flushed.

Rules differ city to city, so check yours: search your city or hauler’s name plus “compost accepted items” and look for pet waste by name. If it isn’t listed as accepted, it isn’t. For which bag fits each answer, see Earth Rated: recycled vs compostable and the broader bag comparison.

Which route fits your household

Your situation	Honest route
One or two dogs, normal backyard compost for the garden	Keep dog waste out of it. Bag in recycled-content film and trash it, or flush unbagged poop where your utility allows.
Your city’s organics program lists pet waste as accepted	Use it, with exactly the bag type they ask for. In Toronto’s case, any plastic bag; compostable doesn’t help there.
Several dogs, space, and willingness to log temperatures	A dedicated hot pile following the USDA guide. Ornamentals only; cure it; keep kids off fresh applications.
You want it gone on-site with minimal effort	An in-ground digester away from gardens and water. Treat what’s in it as waste, not compost.
Puppies, a dog with known worms, or anyone pregnant or immunocompromised at home	Skip home composting. Bag and trash, and follow your vet’s deworming and fecal-testing schedule.

Safety habits if you do compost it

Wash your hands after handling dog waste or the compost. Keep separate tools and gloves for the dog-waste bin.
Keep the bin away from vegetable beds, wells, streams, and anywhere runoff collects.
Don’t let children play where dog-waste compost was recently applied (USDA guide).
Keep your dog on a parasite-control plan from a vet who knows your area. Fewer eggs in means fewer eggs in the pile. CAPC recommends routine fecal testing — at least twice a year in adult dogs, more often in puppies.
Never add cat litter or cat waste.

What we’re not claiming

We’re not saying composting dog waste is impossible or irresponsible — it’s a legitimate kennel practice with a public guide behind it. We’re saying the safe version is specific: dedicated, hot, measured, cured, and kept away from food. A compostable bag tossed in the backyard bin is none of those. For most single-dog homes, a recycled-content bag in the trash (or your city’s pet-waste route, if it has one) is the honest default — and picking up every time is still the part that matters most.

Quick answers

Can I put dog poop in my regular compost bin?

No. University of Maine and University of New Hampshire extension guidance both say never to put dog, cat, or pig manure in your compost pile or vegetable garden, because those manures are more likely to carry parasites that infect people. A household compost bin that also takes food scraps and feeds the garden is the wrong place for it.

Can dog poop be composted at all?

Yes, in a dedicated hot-compost system. A USDA Natural Resources Conservation Service and Fairbanks Soil and Water Conservation District guide shows how: two shovels of dog waste to one of sawdust, a 3–5 foot pile, daily thermometer readings, turning, and temperatures that reach 145°F for several days. The finished compost is for ornamentals and revegetation, not food crops.

Does composting kill roundworm eggs in dog poop?

Not reliably at home. UF/IFAS Extension notes that roundworm (Toxocara canis) is one of the most heat-resistant pathogens in dog manure and that the USDA study could not confirm the process kills it, because the mushers in the study controlled roundworm so well that no infected samples were found. That is why the compost stays off food plants.

Can I use dog poop compost on my vegetable garden?

No. The USDA guide and UF/IFAS say not to apply dog-waste compost to food crops, and Maine, New Hampshire, and Oregon State extension guidance keeps dog waste away from vegetable gardens entirely. Use it on flower beds, shrubs, or revegetation areas, and keep children from playing where it was recently applied.

Do compostable poop bags let me compost dog waste?

Only if the facility that receives them takes both pet waste and that bag. Seattle Public Utilities says pet waste always goes in the trash, whatever the bag. Toronto does take dog poop in its Green Bin, but its anaerobic digesters pull out compostable bags with other plastics and send them to landfill — so any plastic bag works there.

Sources

USDA Natural Resources Conservation Service and Fairbanks Soil and Water Conservation District (2005). Composting Dog Waste. nrcs.usda.gov (PDF); mirror hosted by EPA: epa.gov (PDF)
UF/IFAS Extension Sarasota County, Composting Dog Waste. sfyl.ifas.ufl.edu
University of Maine Cooperative Extension, Bulletin #2510, Guidelines for Using Manure on Vegetable Gardens. extension.umaine.edu
University of New Hampshire Extension, Guidelines for Using Animal Manures and Manure-Based Composts in the Garden. extension.unh.edu
Oregon State University Extension, EM 9475, Do the Rot Thing: Choosing and Using a Composting System. extension.oregonstate.edu
Companion Animal Parasite Council, Ascarid guidelines (dog), updated Feb 2025. capcvet.org
U.S. EPA, 40 CFR Part 503, Appendix B — Pathogen Treatment Processes. ecfr.gov
City of Toronto, What Goes in the Green Bin; Green Bins in Dogs Off-Leash Areas. toronto.ca
Seattle Public Utilities, What to Do with Pet Waste. seattle.gov