N.Y. Comp. Codes R. & Regs. tit. 21 § 890.36
The waters of the Delaware River Basin are limited in quantity and the Basin is frequently subject to drought warnings and drought declarations due to limited water supply storage and streamflow during dry periods. Therefore, it shall be the policy of the commission to discourage the exportation of water form the Delaware River Basin. However, the basin waters have limited assimilative capacity and limited capacity to accept conservative substances without significant impacts. Accordingly, it also shall be the policy of the commission to discourage the importation of wastewater into the Delaware River Basin that would significantly reduce the assimilative capacity of the receiving stream on the basis that the ability of Delaware River Basin streams to accept wastewater discharges should be reserved for users within the basin.
N.Y. Comp. Codes R. & Regs. Tit. 21 § 890.36