N.Y. Comp. Codes R. & Regs. tit. 16 § 503.1
The provisions of this Part shall apply to water corporations providing service to 4,000 or more year-round customers. The standards relating to service interruptions contained in section 503.3 of this Part shall apply to all water corporations under the commission's jurisdiction. In providing service to its customers each water corporation shall comply with the recommended standards for waterworks, policies for the review and approval of plans and specifications for public water supplies, 1987 Edition (hereinafter referred to as the Ten State Standards) as described in section 10.3 of this Title. The text of the Ten State Standards appears in 16 NYCRR section 5-1.22(b) of this Title, Appendix 5-A. Compliance with the standards in this Part does not release a water corporation from complying with all other applicable laws, rules and regulations as promulgated by other governmental bodies. Nor does compliance with these standards release a water corporation from implementing other operating practices, maintenance programs or planning measures which may be necessary to preserve the immediate or long-term viability of the water system and to provide safe and adequate service to its customers.
N.Y. Comp. Codes R. & Regs. Tit. 16 § 503.1