A crop-duster filled with pesticide and water went off the DeKalb-Taylor Municipal Airport runway Monday, causing the pesticide to discharge, but firefighters said there was no leakage into the water supply.

DeKalb Police Chief Joseph Maciejewski said the one-engine plane crashed 200 feet off the runway at about 3 p.m. as it attempted to take off.

About 60 pounds of Sevin 80s, a pesticide used to control “picnic beetle” infestation of corn crops, and 225 gallons of water seeped into an area covering about 500 square feet. The pesticide was believed to be restricted to the site.

“There is no damage to the water supply,” he said, although the site is under quarantine.

He said hydrolized lime was poured on the ground to neutralize the chemical, and contaminated soil was removed from the area.

Chuck Brutlag of the Illinois Environmental Protection Agency said there is no “immediate danger of the chemicals leaking into water supplies of the wells of the homes about 800 feet adjacent to the airport.”

A DeKalb fireman said the area is being tested for chemicals, and test results will take about one week. “The area is being covered with a type of plastic in case it rains,” he said, to prevent any spread of the chemical.

Maciejewski said a city ordinance requires the party responsible for the spillage to pay for the damages.

The crop-duster is owned by Gulf Flying Service of Alabama.

Although the Fire Department’s Hazardous Materials Response Team, the Illinois Emergency Service Disaster Agency and the Federal Aeronautics Administration were also on the scene, the cause of the accident is still undetermined.