AUGUSTA — Mainers are being urged to take advantage of an opportunity to get rid of banned and unusable pesticides for free.

The Maine Board of Pesticides Control is teaming up with the Department of Environmental Protection on a program that allows homeowners, family-owned farms and greenhouse operators to dispose of old pesticides they have hanging around. Officials say it’s not unusual for people to have chemicals such as DDT, lead arsenate and chlordane that are no longer usable or legal.

Officials plan to set up four sites around the state in October where participants can take their unwanted pesticides, which will then be sent to out-of-state disposal facilities.

The registration deadline is Sept. 27. For more information or to register, people can visit www.thinkfirstspraylast.org.