AUGUSTA — Maine is urging residents to take advantage of a free program to safely dispose of pesticides this fall.

The Maine Board of Pesticides Control and Department of Environmental Protection are running a program in October to dispose of old chemicals like DDT and lead arsenate Maine residents might have in their homes. The department is looking to dispose of any banned pesticides or pesticides that have become caked or frozen and are no longer usable.

It says improperly getting rid of these chemicals can contaminate drinking water.

Home, farm or greenhouse owners will be able to bring the pesticides to four locations throughout Maine. Residents must register for the program by Sept. 27 online at http://www.thinkfirstspraylast.org or call 207-287-2731.