One dog, one year. About ¾ of a pound a day adds up to more than the average American man weighs.
Sources: Massachusetts DEP · CDCSo where is all of it supposed to go?
Most of us picked up the rules the same way: from a neighbor, a sign at the park, or the label on a box of poop bags. Some of those rules are right. Six of them aren’t, and a couple of the biggest ones are printed on the bags themselves.
The short answer
- Bag it and put it in a trash can. It’s the one option every agency we checked recommends.
- Never flush the bag, whatever the label says. Flushing the poop alone is allowed in some towns, not others.
- Composting works only in a dedicated hot pile, and never on anything you’ll eat.
- Leaving it isn’t an option, bagged or not.
“It’s natural, so it’s fertilizer”
The EPA lists this one as a misconception, by name.
This is the big one, and it’s the reason so many piles get left in the grass. Cow manure goes on fields, so why not dog poop?
The US Environmental Protection Agency’s guide to pet waste is blunt about it. It lists “it’s natural fertilizer and it just goes away” as a misconception, and calls pet waste a leading source of bacteria and nutrient pollution in city streams. Leave No Trace explains why it’s different from what wild animals leave behind:
A deer’s droppings
Come from plants that grew right there. Same nutrients, back to the same ground.
Your dog’s
Come from dog food made somewhere else. Extra nitrogen and phosphorus the soil and water never had.
Then there’s what lives in it. Massachusetts’ fact sheet notes that dog waste carries billions of fecal coliform bacteria and can carry hookworms and roundworms. Rain doesn’t make any of that disappear. It just washes it somewhere else.
Pick it up, every time, including in your own yard.
“Biodegradable bags break down”
In a landfill, no plastic breaks down within about a year, the FTC says.
If the bag says biodegradable, it feels like the responsible choice. Some people even take it as permission to leave a tied bag behind, since it’ll “break down anyway.”
In 2015, the Federal Trade Commission sent warning letters to 20 companies that make or sell dog waste bags. The problem: most poop bags end up in landfills, and in a landfill, no plastic breaks down within about a year, if it breaks down at all. Calling those bags “biodegradable” without a qualifier, the FTC said, may be deceptive. Its Green Guides spell out the same rule for any product that usually goes to a landfill or incinerator.
California restricts the word “biodegradable” on products altogether.That’s from CalRecycle, the state’s recycling agency. In a trash can, a “biodegradable” bag and a regular one end up in the same landfill or incinerator. On a trail, both are litter.
For the record, we don’t sell poop bags, so we have no bag to talk you into. Pick one that’s thick enough not to tear and long enough to tie with a tight knot. That’s the whole list.
Use whatever bag you like, and put it in a trash can.
“Flushable bags are safe to flush”
Wastewater agencies say never flush a bag, whatever the label says.
Some poop bags are sold as “flushable,” and it sounds like the perfect fix: no carrying, no trash can. The people who run the pipes disagree. The National Association of Clean Water Agencies says never flush the bag, and Troutdale, Oregon says any bag is a problem for its treatment plant, biodegradable ones included.
The poop itself? The EPA once told people to flush it.A 2001 EPA bulletin says pet waste should go down the toilet, as long as nothing else goes with it. Twenty-five years later, agencies still don’t agree.
| Who | Flushing the poop (no bag) |
|---|---|
| Bellevue, Washington | OK, with toilet paper only. Not on a septic system. |
| Clark County, Washington | Not recommended. Most private septic systems can’t handle it. |
| Troutdale, Oregon | Fine for the treatment plant, but not in public restrooms. |
Never flush the bag. If you want to flush the poop, check your local water utility first, and skip it on septic.
“It’s organic, so it goes in the green bin”
New York and Seattle both say no pet waste in the compost bin.
Banana peels go in the compost bin. Grass clippings go in the compost bin. Dog poop is organic too, so it should go there as well, right?
Not in the cities we checked. New York’s curbside composting doesn’t take pet waste, and Seattle’s food and yard waste poster says it in capital letters: NO PET WASTE.
City green bin
Doesn’t run hot enough to make dog waste safe, Bellevue explains. Keep it out.
Your own hot pile
Possible, if it holds 145°F for several days. Flower beds only, never food.
The home option comes from a USDA guide to composting dog waste, which names roundworm eggs as the main thing the heat has to kill. It works, but it’s a project.
Keep it out of the city green bin. If you want to compost it, give it its own hot pile, and use the result on flower beds only.
“I’ll grab the bag on the way back”
One national park puts it in writing: a bag left on the trail is littering.
You’ve seen them: little tied bags sitting by the trailhead, on a rock, at the base of a sign. Most weren’t left by people who didn’t care. They were left by people who meant to come back.
Leave No Trace wrote a whole post about it, “What’s With All the Dog Poop Bags?” The answer is mostly hands. With a leash in one hand and a phone or water bottle in the other, people set the bag down to pick up later, and then they forget.
“Leaving bagged waste on the trail is littering.”That’s the National Park Service, on its page for the C&O Canal, a park with no trash cans on the trail.
The fix isn’t more willpower. It’s getting the bag out of your hand without putting it on the ground. Tie it tight, then clip it to the outside of your leash or bag. We make a small one for exactly this, the Pack’n Carry poop bag carrier: it holds tied bags by the knot until you reach a trash can. Then toss it at the first one you pass.
Keeping the smell out of your car
- Tie it tight, as close to the poop as you can, so there’s less air in the bag.
- Double-bag it if you’ve got a long way to go.
- Keep it on the outside. Not in a jacket pocket, not in the backpack, not inside the car.
- Bin it at the first trash can, not the one at home.
“Burying it is the eco-friendly option”
Burying comes with strict rules, and many parks just say pack it out.
Burying sounds like the outdoorsy, back-to-nature answer. The rules are pickier than most people expect, and they change depending on where you are.
| Where | The rule |
|---|---|
| Your yard | At least 1 foot deep, covered with at least 8 inches of soil, near ornamental plants only and never in a vegetable garden (EPA, 2001). |
| Backcountry | A hole 6 to 8 inches deep, at least 200 feet from any water (Leave No Trace). |
| Many parks | Bag it and pack it out. The National Park Service’s B.A.R.K. Ranger rules start with “Bag your pet’s poop.” |
Clark County adds that it should never be buried near surface water or groundwater, or anywhere food is grown. In practice, burying it right is more work than carrying it out.
Check the rules where you’re walking. When in doubt, bag it and carry it out.
So what should you actually do?
| Option | Works when | Doesn’t work when |
|---|---|---|
| Trash can | Almost always. The option every agency we checked recommends. | The trash can is miles away, so carry it until you reach one. |
| Toilet | Poop only, and your local utility says it’s OK. | You’re on septic, it’s a public restroom, or there’s any bag involved. |
| Compost | A dedicated pile that holds 145°F for days. | The city green bin, or anything you’ll eat. |
| Bury | You follow the depth and distance rules, and the park allows it. | A vegetable garden, near water, or a park that says pack it out. |
| Leave it | Never. | Ever. Bagged or not. |
Quick answers
Can you flush dog poop down the toilet?
Sometimes. The poop alone is fine in some towns and not recommended in others, so check your water utility. Never flush the bag, and skip it entirely on a septic system.
Is dog poop bad for my lawn?
It isn’t the fertilizer it looks like. The EPA calls that a misconception, and Bellevue says plainly that dog poop is not a fertilizer. Pick it up from the yard too.
Can I put it in my neighbor’s trash can?
Rules and manners vary from place to place, and we couldn’t find a single answer we’d trust. When you can, use a public trash can or carry it home.
How long does dog poop take to break down?
You’ll see confident numbers online. We couldn’t find one from a source we’d stand behind, so we won’t give you one. It doesn’t change the answer anyway: pick it up.
Carrying more than a leash on your walks? Our dog walking essentials page has a quick guide to picking the right bag for how you walk.
