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Dog Poop Is Not Fertilizer: 6 Myths About Dog Waste, Your Lawn and Your Health

Six myths about dog waste, your lawn, and your health, checked against the EPA, CDC, Connecticut DEEP, and Westchester County. Every fact sourced.

The Poop Troop team

All notes

Cover card: Dog poop is not fertilizer. Six myths, busted with sources.

It's time to talk sh*t. Here are the six things we hear most about dog waste, and what the people who study it actually say.

Myth 1: "It's natural. It fertilizes the lawn."

Fact: Westchester County's stormwater office says it plainly: "Pet waste is NOT fertilizer!" It's a source of bacteria and excess nutrients that runoff carries to local waters (Westchester County Dept. of Planning, "Stormwater"). The U.S. EPA calls pet waste "a leading source of nutrient and bacteria pollution in urban streams and waterways" (U.S. EPA, "Stormwater Best Management Practice").

Myth 1, busted: "It's natural. It fertilizes the lawn." Pet waste is not fertilizer. Source: Westchester County Dept. of Planning.

Myth 2: "It just breaks down on its own."

Fact: The pile can disappear while the problem stays. The CDC says roundworm (Toxocara) eggs from dog feces become infective after 2 to 4 weeks and can survive in soil for months or years (CDC, "How Toxocariasis Spreads"). WSU Extension notes roundworm eggs can stay viable in soil for years (WSU Extension).

Myth 2, busted: "It just breaks down on its own." Roundworm eggs can survive in soil for months or years. Source: CDC; WSU Extension.

Myth 3: "Rain washes it away. Problem solved."

Fact: That is the problem. Runoff from rain and melted snow goes to storm drains and is carried untreated to streams, ponds, reservoirs, Long Island Sound and the Hudson (Westchester County Dept. of Planning, "Step by Step"). In the Sound, pet waste's nitrogen and phosphorus feed algae and low oxygen (Long Island Sound Partnership).

Myth 3, busted: "Rain washes it away." Storm drains carry it untreated to streams, reservoirs, and Long Island Sound. Source: Westchester County Dept. of Planning.

Myth 4: "Composting it is the eco move."

Fact: Connecticut's environmental agency says to always pick it up and put it in the trash, and not to compost it, even in a biodegradable bag (CT DEEP, "It's Greening Cats and Dogs").

Myth 4, busted: "Composting it is the eco move." CT DEEP says not to compost dog waste, even in a biodegradable bag.

Myth 5: "Brown spots? Must be the poop."

Fact: Urine is the bigger lawn burner. Feces release nitrogen slowly, and the recommendation is to remove them before turf damage starts (Mississippi State Univ. Extension).

Myth 5, busted: "Brown spots? Must be the poop." Urine is the bigger lawn burner. Source: Mississippi State Univ. Extension.

Myth 6: "One dog can't make much difference."

Fact: Connecticut's statewide bacteria plan estimates about 200 grams of feces per dog per day, with fecal coliform as high as 23 million per gram (CT DEEP, Statewide Total Maximum Daily Load). With about 89.7 million dogs in U.S. homes (Larkin), it adds up.

Myth 6, busted: one dog still leaves about 200 grams of feces a day, with fecal coliform as high as 23 million per gram. Source: CT DEEP.

The bottom line

Pick it up, bag it and trash it. The CDC recommends picking up pet waste daily (CDC, "How Toxocariasis Spreads"). If you want a backstop, Poop Troop runs standing weekly visits across lower Fairfield County and Westchester: a grid walk of the whole yard, complete haul-away, gate photographed and secured, no contracts.

Mission: return the lawn to the dogs. Standing weekly visits, a grid walk, haul-away, a gate photo, and no contracts.

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— The Poop Troop team

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