N.J. Stat. Ann. § 58:11-57

Nothing in this act shall be construed as requiring any public sewage treatment plant to grant a connection or permit the discharge into its treatment facilities of any sewage which, in the judgment of the official body responsible for the management and control of said plant, exceeds the capabilities of the plant to treat adequately. Such official body may, in addition to any pretreatment standards imposed under this act, require of any user or prospective user of its facilities such other pretreatment of industrial wastes as it deems necessary to make possible the adequate treatment of such wastes.