The forum, which was sponsored by the Orange-Chatham Group of the Sierra Club, was divided into three sections, each section presenting new questions for the candidates.
The sections allowed Chapel Hill residents and members of the club to hear candidates express their views on environmental issues.
Candidates voiced their opinions on issues such as water pollution in local streams, widening Columbia Road and tree ordinances in Chapel Hill.
Each candidate said receiving support from the Sierra Club would be beneficial to his mayoral campaign.
"The Sierra Club is a very strong local organization," said candidate Kevin Foy. "It is as strong here as it is anywhere. Their endorsement is a very strong endorsement."
The Sierra Club's Web site states that the group has 700,000 members. The group focuses on environmental issues and strives to educate the public on environmental protection and restoration.
The club's political committee supports candidates for office through endorsements, publicity and contributions. Before the Nov. 6 election, the club plans to endorse one of the candidates.
"All endorsements are important," said candidate Lee Pavao. "The Sierra Club is a respected entity."
The forum began with set questions from the Sierra Club moderator that were directed to all candidates.