Can I Compost Pet Waste at Home?

Short answer: yes, but not in your regular compost pile, and not without specific setups, handling protocols, and end-use restrictions. Pet waste is biologically different from kitchen scraps and yard waste — it contains pathogens that can persist through casual backyard composting and pose health risks if the finished material is used on food crops. Composting pet waste correctly means treating it as a distinct waste stream with its own system.

This is the working answer to a question that comes up in nearly every backyard composting conversation. Some people assume any organic material can go in any pile; others assume pet waste must always go to landfill. The truth is in between, and the details matter for whether you actually want to do this.

Why pet waste is different from kitchen scraps

Three biological realities make pet waste a special case:

Pathogens. Dog and cat feces can contain bacteria (E. coli, Salmonella, Campylobacter), parasites (roundworms, hookworms, Toxoplasma in cats), and viruses (parvovirus, distemper) that survive in soil for extended periods. Some of these — Toxoplasma in particular, from cat waste — can infect humans and cause serious illness, especially in immunocompromised individuals or pregnant women. Roundworm and hookworm eggs from dog waste can persist in soil for years and cause infections (visceral larva migrans, cutaneous larva migrans) in humans, particularly children.

Pathogen kill requires high temperatures. A standard backyard compost pile might reach 110-120°F during active composting. Industrial composting reaches 130-160°F and holds those temperatures for days. Pathogen kill requires sustained temperatures above 131°F for at least three consecutive days — a threshold most backyard piles never reach reliably.

Nitrogen content is high. Pet waste, like human waste, is concentrated nitrogen relative to typical garden compost inputs. Adding it to a mixed pile without proper carbon balance creates anaerobic, ammonia-smelling problems.

These three realities mean pet waste either needs to: (1) go to industrial composting facilities (which most municipalities don’t accept), (2) go to landfill (the most common current default), or (3) get composted at home in a dedicated system designed for it.

What systems actually work for home pet waste composting

Three working approaches exist:

1. In-ground pet waste digesters

Devices like the Doggie Dooley or similar in-ground digesters work like a small septic tank for pet waste. You dig a hole 2-3 feet deep, install the digester, and add pet waste plus enzymes or bacterial starter. The system relies on bacterial breakdown of the waste underground, where it stays out of contact with people, plants, and water tables.

How it works:

• Bury the digester unit in a corner of the yard, away from vegetable gardens and at least 50 feet from any well or water source.
• Add pet waste through a lid at the top.
• Add an enzymatic starter or anaerobic digester bacteria periodically (sold as a powder or tablet).
• Add water to keep the contents moist.
• The waste breaks down anaerobically over weeks to months and the resulting liquid drains into the surrounding soil.

This isn’t composting in the strict aerobic-decomposition sense — it’s more like a slow anaerobic digestion. The output isn’t usable compost; it just disposes of the waste in place. The advantage is convenience — no transport, no separate pile to manage.

Cost: $50-150 for the in-ground unit, plus ongoing enzyme starter (~$15-25/year).

Limitations: works best in warm climates where soil bacterial activity stays active year-round. Slows or stops in cold winters. Doesn’t work in heavy clay soils that don’t drain. Requires periodic refresh as the system saturates.

2. Dedicated pet-waste-only compost pile

A separate compost pile reserved exclusively for pet waste plus high-carbon browns. Located away from the main garden, food-growing areas, and play areas.

How it works:

• Choose a location at least 100 feet from food gardens, 50 feet from water sources, and out of high-traffic areas.
• Build a contained bin (untreated wood, wire mesh, or plastic) of at least 3’x3’x3′ — minimum size for getting any meaningful heating.
• Add pet waste in roughly 1:2 ratio with carbon-rich browns (sawdust, dry leaves, shredded paper).
• Maintain moisture at “wrung-out sponge” level.
• Turn regularly to introduce oxygen and encourage thermophilic activity.
• Monitor temperature with a compost thermometer. The pile should reach 130-150°F during active composting.

The challenge: most backyard pet-waste piles don’t reach the temperatures required for pathogen kill. Single-pet households simply don’t generate enough waste to fuel a hot pile. The result is a slow, cool decomposition that produces partially-broken-down material with pathogens potentially still active.

For this reason, finished material from a backyard pet waste pile should be used only on ornamental plants, trees, or non-food landscaping — never on vegetable gardens, fruit trees, or near edible plants. Even with that restriction, some health professionals recommend against any use of pet-waste compost in residential settings due to pathogen risk.

3. Bokashi for pet waste

Bokashi systems use anaerobic fermentation with EM (effective microorganisms) bran to ferment organic material in a sealed bucket. Pet waste can be processed this way, though it requires a dedicated bokashi bucket separate from any kitchen-scrap bokashi.

How it works:

• Dedicated 5-gallon bokashi bucket with airtight lid and drainage spigot.
• Layer pet waste with bokashi bran (typically 1-2 tablespoons of bran per layer of waste).
• Press down to remove air pockets.
• Drain liquid (bokashi tea) every 2-3 days.
• Seal and ferment for 2-3 weeks.
• After fermentation, bury the fermented contents in soil at least 12 inches deep in an area not used for food.

The fermentation acidifies the waste, which inhibits some pathogens, but doesn’t fully sterilize it. The buried fermentation residue continues to break down underground over several months. Like the dedicated compost pile, the resulting soil is for ornamental use only.

Cost: $30-80 for the bucket setup, plus ongoing bran (~$25-40/year).

Advantage: more controlled than open-pile composting, can be done in cold climates, and works in small yards.

What about flushing or municipal pickup?

Two alternatives worth knowing about, even though they’re not composting:

Flushing dog waste. Some U.S. cities allow flushing dog waste down the toilet (paper-bagged but no plastic). The municipal wastewater treatment plant handles it through the same pathogen-kill processes used for human waste. Check with your local utility — some allow it, some don’t. Cat waste should NOT be flushed because Toxoplasma can survive wastewater treatment and end up in waterways.

Pet waste pickup services. A growing category in some cities — services like DoodyCalls, Pooper Scoopers, and various local franchises will collect dog waste weekly and transport it to facilities that can process it (some industrial composting, some specialized landfill). Cost: $20-60/month depending on yard size and frequency.

Curbside organics with pet waste accepted. Rare but growing. A few cities (Vancouver BC has done this; some smaller programs in California) accept dog waste in curbside organics collection because they send it to industrial facilities with verified pathogen-kill processes. Check your local program — most still exclude it.

What home pet-waste compost can and can’t be used for

Even from the best-managed home pet-waste compost system, treat the finished material as restricted-use:

Acceptable uses:

• Ornamental flower beds (annuals, perennials)
• Shrubs and ornamental trees
• Lawn topdressing in non-play areas
• Building soil in areas that won’t be used for food production for at least 2 years

Never acceptable uses:

• Vegetable gardens (any type)
• Herb gardens
• Fruit trees and berry bushes
• Anywhere children play directly on the soil
• Anywhere root vegetables (carrots, beets, potatoes) might be grown in the future
• Near drinking water wells or surface water

The “2 year” recommendation comes from extension service guidance on how long pathogens may persist in soil even after composted application. Some pathogens have been documented to survive longer in cold or moist conditions.

What to avoid

A few mistakes to skip:

Adding pet waste to your main compost pile. This contaminates the entire pile with pathogens and makes the resulting compost unsuitable for any food-related use. If you’ve already done this with a small amount, the simplest mitigation is to use the resulting compost exclusively on ornamental landscaping and to be especially careful about hand-washing after handling it.

Composting cat litter that contains clay, silica, or pine. Most cat litter isn’t compostable even if the cat waste is. Clay-based litters don’t break down. Silica gel litters definitely don’t. The only litters that can go into a dedicated pet-waste system are unscented paper-based, wheat-based, or corn-based litters that are themselves compostable. Even with these, the litter-to-waste ratio means you’re mostly composting litter rather than waste.

Using pet waste compost on a lawn where kids play barefoot. Even on ornamental lawn applications, restrict play access. Compost worked into ornamental beds away from foot traffic is the safer choice.

Composting waste from a sick pet. If your dog or cat has recently had a parasitic or bacterial infection, their waste likely contains higher pathogen loads. Skip composting until at least 30 days after the infection is fully resolved and the vet confirms the pet is no longer shedding.

Burying waste in random spots. Some people just bury pet waste in the yard. This isn’t composting, doesn’t break down pathogens, and creates ongoing soil contamination spots. Use a defined system instead.

The honest math on whether it’s worth it

For a household with one or two dogs producing modest waste volume, home pet-waste composting can absolutely work. It diverts a meaningful amount of material from landfill (a medium dog produces about 0.5-1 lb of waste daily — over 200-365 lbs per year), and the in-place processing avoids transport emissions.

For households with multiple large dogs producing significant volume, the system requirements scale up. You may need multiple in-ground digesters, a substantial dedicated pile, or to combine home composting with a paid pickup service.

For most cat households, cat waste composting is harder because of Toxoplasma concerns. Many veterinarians and public health professionals recommend against any home composting of cat feces, especially in homes with pregnant women, immunocompromised individuals, or young children. The risk-benefit tilts toward landfill disposal for cat waste in most situations.

When this is the wrong approach

If any of these apply, home pet-waste composting probably isn’t right for you:

• Pregnant household member (Toxoplasma risk from cat waste; some other parasites for dog waste)
• Immunocompromised household member
• Young children playing in yard
• Yard too small for safe siting (need adequate buffer from gardens and water)
• Heavy clay soils that don’t support in-ground digesters
• Multiple large dogs producing more waste than system capacity
• HOA or local restrictions on outbuildings, digging, or composting

For these situations, paid pickup services, municipal acceptance where available, or careful bagged disposal to landfill are the practical alternatives.

Practical resources

A few good sources for further reading and product evaluation:

• USDA Natural Resources Conservation Service has guidance documents on pet waste composting protocols at the homestead scale.
• Some state cooperative extension offices have published research-based pet waste composting guides (Washington State University, Cornell, University of Minnesota all have versions).
• The CDC has guidance on Toxoplasma prevention that’s worth reading before composting cat waste under any circumstance.

The compostable products industry doesn’t currently make pet-waste-specific bags, though compostable bags can serve double duty for picking up waste before disposal in your chosen system.

The takeaway

Can you compost pet waste at home? Yes, with the right system, the right location, and clear rules about where the finished material can be used. The right system is either a dedicated in-ground digester, a separate hot-composting pile with strict pathogen-kill temperature management, or a bokashi setup with proper post-fermentation burial. The right location is at least 100 feet from food gardens and 50 feet from water sources. The end-use rule is: ornamental landscaping only, never food production.

If those requirements don’t fit your situation, paid pickup services, municipal acceptance (where available), or careful bagged disposal to landfill are reasonable alternatives. There’s no shame in not composting pet waste at home — many circumstances make it impractical.

If they do fit your situation, you can divert hundreds of pounds of waste from landfill annually, reduce your household’s environmental footprint, and develop a closed-loop system that handles all your dog-related organic waste in your own yard. The system isn’t complicated once it’s set up. The first month is the learning curve; after that, it’s a 10-minutes-a-week routine.

Either way, knowing what’s actually involved is better than guessing or assuming. Pet waste isn’t kitchen scraps. Treating it like one of them is a mistake. Treating it correctly — with a dedicated system and clear end-use restrictions — turns it from a daily small problem into a managed, controlled diversion from landfill.

For B2B sourcing, see our compostable supplies catalog or compostable bags catalog.

Background on the underlying standards: ASTM D6400 defines the U.S. industrial-compost performance bar, EN 13432 harmonises the EU equivalent, and the FTC Green Guides govern how “compostable” can be marketed on packaging in the United States.