Labour Relations is a fundamental core business for the GTSWCA. The Association is the accredited bargaining agency for Board Area 8 and Simcoe County in the Sewer and Watermain sector. This means that GTSWCA negotiates the collective agreement which will govern the labour conditions in these areas. The accreditation certificates exist with Labourers International Union of North America Local 183, International Union of Operating Engineers Local 793 and Teamsters Union Local 230.