A federal mediator was scheduled to meet with members of the Teamsters Local 25 and the trash company providing garbage services in more than a dozen Bay State cities and towns on Tuesday.

Republic Services trash and recycling collectors have been on strike since July 1 in several Massachusetts towns. Trash is piling up and negotiations have stalled after failed talks with federal mediators.

Negotiations between Republic Services and Teamsters broke down late last week. Talks are set to resume Tuesday, but the impacts of the trash strike are growing more pronounced.

The work stoppage, led by Teamsters-affiliated employees demanding contract improvements, has now impacted waste collection in parts of King and Snohomish counties.

Republic Services sanitation workers are honoring picket lines in solidarity with striking workers in Boston. In the meantime, some cities are offering trash drop-off sites.

Chula Vista’s city manager said she’s ready to declare an emergency if the increasing trash becomes a health hazard.

Republic Services and the Teamsters have been at a standoff since July 1, when 450 local workers went on strike after the union's contract expired. Teamsters are seeking better wages, benefits and stronger labor protections.

Workers have walked off the job in parts of Los Angeles, Orange and San Diego counties, as well as the Bay Area.