Animal control officers have been knocking on dozens of doors in Sudbury, responding to complaints about dog poop.

The city's poop-and-scoop bylaw requires owners to clean up after their dogs, on both public and private property.

The Rainbow District Animal Control office receives roughly 100 complaints about dog droppings every year and animal control officers will go out looking for perpetrators.

"We have unmarked vehicles … to catch some of these people who are not picking up," said Richard Paquette, a spokesperson with animal control.

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The Rainbow District Animal Control office in Sudbury receives roughly 100 complaints about dog droppings every year. (Erik White/CBC)

'Happens in a split second'

Paquette said the fine for not cleaning up dog poop is $125 dollars and, if not paid, could run into the thousands of dollars.

But he noted he focuses on educating the public about the bylaw and hands out very few tickets.

"The problem with poop and scoop enforcement is that it happens in a split second," he said.

Paquette said he aims to educate Sudburians about the health and environmental impact of the waste produced by the tens of thousands of dogs in the city.

When it rains, as it has this week, any kind of litter is bound for Sudbury's lakes, said Laurentian University biologist Charles Ramcharan.

"Every one of those streets has a storm drain underneath, so we all live above little rivers that lead right to the lake," he said.

But Ramcharan noted a much greater risk to Sudbury's lakes is human waste — from waterfront septic tanks.