N.J. Stat. § 24:12-10
The owner or operator of each plant shall undertake periodic testing of the bottled water to determine the presence of hazardous contaminants as identified pursuant to section 2 of P.L. 1983, c. 443 (C. 58:12A-13). The tests for hazardous contaminants shall be conducted in accordance with sampling and testing methods and techniques established by the Commissioner of Environmental Protection, the testing to be conducted by a laboratory certified for this purpose by the commissioner. The initial tests for substances identified in subsection a. of section 2 of P.L. 1983, c. 443 (C. 58:12A-13) shall be conducted not later than one year after the effective date of this act and subsequent tests shall be conducted semiannually thereafter, unless the Commissioner of Health shall determine, on a case-by-case basis, that a greater or lesser frequency of testing is necessary or sufficient to ensure the public health and safety.
The initial tests for substances for which maximum contaminant levels have been established pursuant to subsection b. of section 2 of P.L. 1983, c. 443 (C. 58:12A-13) shall be conducted not later than one year after the effective date of this act and subsequent tests shall be conducted annually thereafter, unless the Commissioner of Health shall determine, on a case-by-case basis, that greater or lesser frequency of testing is necessary or sufficient to ensure the public health and safety.
N.J.S. § 24:12-10