121. The Community shall have in its territory such competence as is provided by this act in the following matters:(a) the valuation of taxable or non-taxable property in each of the municipalities in its territory, the revision of valuations, and the census;
(b) the establishment of a development plan;
(c) the establishment of a centralized department for data processing, making of a collection roll for municipal and school taxes and the sending of tax accounts;
(d) the elimination of air pollution;
(e) the standardization of traffic regulation, the synchronization of mechanical traffic control systems on the main communication thoroughfares and intermunicipal streets;
(f) the establishment of intermunicipal drinking water systems;
(g) intermunicipal sewers and intermunicipal water purification works;
(h) garbage disposal;
(i) public health;
(j) the establishment of minimum standards for construction;
(k) the coordination and, if need be, integration of police departments and the coordination of fire prevention departments in the territory of the Community.