The Brookfield Water Pollution Control Authority is currently comprised of seven members. Commission members are appointed by the Board of Selectman, usually at the recommendation of a Vacancy Committee. It is the Democrat or Republican Vacancy Committees that conduct interviews and background checks of potential board members.

The WPCA Commissioners are appointed for four-year terms. Their terms can be renewed. Each year, the commission selects the Chairman and Vice Chairman, by a simple majority vote. Besides being interested in quality governance, each commission member must be a resident of Brookfield to be eligible to serve.

The current commission is comprised of the following volunteer members: