N.J. Stat. § 40A:26A-19
A local unit or local units may authorize officials or other agents of the local unit or units to enter upon any land or water for the purpose of making surveys, studies, investigations or inspections. The officials or other agents are empowered to examine pipes or any equipment connected to the sewerage facilities or service pipes for compliance with established standards and other requirements.
The use of sewerage facilities to any property may be discontinued if the owner, lessee or other user of that property opposes or obstructs an authorized official or other agent in the performance of his duties. The discontinuance shall continue until the required investigations or inspection are made, and any alterations or repairs found to be necessary have been made and approved by the appropriate official or agent.
N.J.S. § 40A:26A-19