BANGOR, Maine — City councilors will vote Monday night on whether one of the city’s three methadone clinics will be allowed to expand.

Penobscot Metro Treatment Center on Hogan Road in Bangor wants to expand its patient cap from 300 to 500. It has the necessary approvals from the state to do so but also needs the city’s approval.

The proposal has prompted impassioned debates, sharp questioning and a barrage of criticism from several members of the council during committee meetings and public hearings on the proposal.

Councilors critical of the proposal argued that Bangor has taken on the brunt of the effort in Maine to support addiction treatment and that other communities should step up as well. If addiction treatment providers want to expand, they should consider other parts of the state, such as Aroostook or Washington counties, which are struggling with their own addiction crises, critics argue. That also would allow people struggling with addiction who have to travel to Bangor, often on a daily basis to get their methadone, to stay closer to home for treatment.

Colonial Management, the parent company that oversees Penobscot Metro, said setting up smaller satellite facilities in smaller communities is cost-prohibitive. An expansion in Bangor could begin providing badly needed treatment quickly, without the added time and expense of searching for a new location elsewhere.

Supporters and opponents of the expansion bid have agreed there is strong demand and need for addiction treatment. Penobscot Metro says it has a waitlist of 173 people who have called the clinic seeking treatment but was only able to reach 60 of them after following up weeks later.

The longer those people wait for treatment, the more likely they are to decide to stop seeking it and continue using drugs instead, according to James Harrison, regional director for Colonial Management Group.

The meeting starts at 7:30 p.m. Monday in city council chambers on the third floor of city hall.

Follow Nick McCrea on Twitter at @nmccrea213.