Why does my Gresham, OR yard smell like dog poop?
Usually because there is poop you have not found, or urine soaked into the ground. Both come back strongest after rain, which in Oregon is most of the year. Here's where the smell hides, how to tell which one you have, and how to clear it.
The short answer: there is waste you cannot see
A yard that smells like dog poop almost always has old waste in it. Piles get flattened into the grass, pushed under shrubs, or hidden in bark and gravel, and they keep smelling long after they stop being easy to spot. The other common cause is urine that has soaked into soil, concrete or artificial turf.
Why does it smell worse after it rains?
Rain rewets old waste. A pile that dried out and went quiet softens again and starts to smell, and urine salts in the soil release that sharp ammonia odor when they get wet. A warm, sunny afternoon after a rainy week is often when the yard smells worst. It is also why the smell seems to come back even after you scooped what you could see.
Where the smell hides
- Long grass along the fence, where piles sink out of sight.
- Under shrubs, decks and stairs, where a dog likes privacy.
- Bark mulch and gravel, which hold both poop and urine in the top layer.
- Concrete patios and dog runs. Concrete is porous, and urine soaks in.
- Artificial turf, where urine collects in the backing and the infill underneath.
- The dog's favorite corner, where months of use concentrate in one spot.
Is it poop or urine?
Poop smells sour and heavy, and it is strongest close to the ground where the piles are. Urine smells sharp, like ammonia, and it is strongest on hard surfaces and in the places your dog goes every day. Many yards have both.
Do not use bleach on urine spots. Urine contains ammonia, and mixing bleach with ammonia can release harmful fumes. Use an enzyme cleaner made for pet urine instead: it breaks down the compounds that cause the smell rather than covering them up.
How to get rid of the dog poop smell
- Do one full cleanup. Walk the whole yard in a grid, including the fence line, under shrubs and the edges of the lawn. Old, flattened piles count.
- Rinse hard surfaces with a hose, then treat urine spots on concrete and turf with an enzyme cleaner.
- Refresh the top layer of bark or gravel in the spots your dog uses most.
- Water down urine spots on the lawn to dilute what is in the soil.
- Keep a weekly schedule afterward, so waste never builds up again.
If the yard has gone a month or more, a one-time yard cleanup is the fastest way back to a clean start.
What about flies?
Flies lay their eggs in dog poop, and in warm weather a fresh pile can draw them within hours. Flies around the yard are another sign there is waste somewhere, and they go away when the waste does.
How to keep the smell from coming back
The smell depends on how long waste sits in the yard, so frequency is what fixes it. For most homes, scooping every week keeps the yard from smelling at all, even through the rainy months. Our guide to why wet months matter most explains what rain does to a yard.