N.J. Admin. Code § 7:1H-2.4
Any municipal or regional health agency which is presently providing environmental health services which meet the administrative and performance standards set forth herein and which is willing to coordinate its environmental health programs with those of its neighbors by implementing the work program of the county department or the designated lead agency, may petition the commissioner for certification and upon certification become the authorized local health agency for the performance of one or more environmental health services within its jurisdiction, if said agency serves a minimum population of 25,000. A contractual relationship whereby one municipality provides environmental health services to one or more other municipalities located in the same county will be certified as a regional health agency if the provisions of these standards are met.
N.J. Admin. Code § 7:1H-2.4