Can you get sick from dog poop?
Yes, you can get sick from dog poop. A single gram carries about 23 million fecal coliform bacteria, including E. coli. The EPA has classified pet waste as a nonpoint source pollutant since 1991, alongside oil and pesticides.
The numbers behind the risk
One gram holds roughly 23 million fecal coliform bacteria. A single large dog's daily output carries around 7.8 billion, which is enough bacteria to close 15 acres of shellfish beds. Those are not scare figures, they are the figures stormwater agencies use when they write pet waste ordinances.
How exposure actually happens
Rarely by touching it. Usually by walking through a yard and carrying it inside on shoes, by a child playing on grass where waste sat, or by a dog rolling in an area that was cleaned too late. Bacteria persist in soil after the visible waste is gone.
Why it matters beyond your yard
Rain moves it. In some cities up to 30% of the harmful bacteria measured in stormwater has been traced to dog waste. When it reaches water it consumes dissolved oxygen as it breaks down, which is what kills fish and drives algae blooms.
At a glance
| Bacteria per gram | 23 million | Fecal coliform, including E. coli |
| One large dog, per day | 7.8 billion | Enough to close 15 acres of shellfish beds |
| EPA classification | Since 1991 | Nonpoint source pollutant |
| Share of city stormwater bacteria | Up to 30% | Traced to dog waste |
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