What's Actually in Dog Poop?
A single gram of dog feces can contain up to 23 million fecal coliform bacteria. Beyond bacteria, dog poop can harbor:
23 million/gram
Fecal coliform bacteria
EPA estimate
Thousands
Parasite eggs
If dog is infected
~1 year
Decomposition time
If not removed
200+ ft
Rain runoff contamination
From a single pile
Bacterial Diseases
| Bacteria | Disease | Symptoms in Humans | Transmission |
|---|---|---|---|
| E. coli | Gastroenteritis | Diarrhea, cramps, fever | Fecal-oral, contaminated water |
| Salmonella | Salmonellosis | Diarrhea, fever, vomiting | Fecal-oral, contaminated surfaces |
| Campylobacter | Campylobacteriosis | Bloody diarrhea, fever | Fecal-oral |
| Leptospira | Leptospirosis | Flu-like, can affect kidneys/liver | Contact with contaminated water |
Parasitic Diseases
- Toxocara (roundworm) — visceral and ocular larval migrans from ingesting eggs.
- Hookworm — cutaneous larval migrans from larvae penetrating skin.
- Giardia — diarrheal disease from ingesting cysts.
- Cryptosporidium — diarrhea, especially dangerous for immunocompromised.
How Transmission Occurs
- Direct contact — handling waste without gloves, then touching face/mouth.
- Soil contamination — parasite eggs persist in soil long after poop decomposes.
- Water contamination — rain washes bacteria from waste into waterways and wells.
- Fly transfer — flies land on waste, then on food or surfaces.
- Pet contact — dogs step in their own waste and track it indoors.
Protection Strategies
- Remove waste from the yard at least weekly — more often is better.
- Wash hands after being in areas where dogs defecate.
- Wear shoes outdoors.
- Do not use dog waste as garden fertilizer (unlike herbivore manure, carnivore waste is not safe).
- Keep dogs on monthly parasite prevention.
- Clean up after your dog on walks — it protects the entire community.
Tip
The EPA classifies dog waste as a nonpoint source pollutant — in the same category as herbicides and insecticides. Regular removal is an environmental responsibility, not just a convenience.
Related Resources
- Get a Free Quote →
Professional pet waste removal keeps your yard safe and makes health monitoring easier
- Healthy Poop Color Chart →
Visual reference for normal vs abnormal dog poop colors