The council shall consist of the chairman of the bay district board, who shall serve as an ex officio member, and 20 members who preferably are skilled and experienced in the field of air pollution, including at least three representatives of public health agencies, at least four representatives of private organizations active in conservation or protection of the environment within the bay district, and at least one representative of colleges or universities in the state and at least one representative of each of the following groups within the bay district: regional park district, park and recreation commissions or equivalent agencies of any city, public mass transportation system, agriculture, industry, community planning, transportation, registered professional engineers, general contractors, architects, and organized labor.
To the extent that suitable persons cannot be found for each of the specified categories, council members may be appointed from the general public.