N.J. Admin. Code § 7:10-7.1
This subchapter contains the Department's secondary drinking water regulations, promulgated pursuant to the State Act. These regulations apply to any contaminant in drinking water which may adversely affect the taste, odor, or appearance of such water, or which may otherwise adversely affect the public welfare. This subchapter specifies the upper limits or optimum ranges of contaminants in drinking water required to be met by any water system when the Department or the administrative authority having jurisdiction over the water system finds a need therefor. The optimum range or the upper limit for any contaminant in drinking water as specified in this subchapter is the recommended level for such a contaminant as delivered to the free-flowing outlet of the ultimate user of a public or nonpublic water system. These standards shall be met whenever a new source of water supply is constructed or added to a water system. For existing water systems, the Department may require treatment(s) to meet these standards, if the exceedance of one or more of these standards causes adverse effects on the consumers of such systems.
N.J. Admin. Code § 7:10-7.1