N.J. Stat. Ann. § 58:12A-14

The water purveyor whose water was submitted for a potability test required by this amendatory and supplementary act shall forward to the department a copy of all test results. The certified laboratory conducting the potability test may, upon written approval by the department, submit the test results on behalf of the water purveyor. The department is authorized to conduct spot checks to assure compliance with this amendatory and supplementary act and the accuracy and integrity of the reported results.