N.Y. Envtl. Conserv. Law § 17-0828
In addition to any other requirements imposed by this title, any person seeking a SPDES permit or a renewal hereunder, within an area designated pursuant to any federal or state statute as a sole source aquifer, shall include as a part of the required information, the name and address of all public water purveyors with a service area or portion thereof located within a three mile radius of the applicant's facility. The names of all public water purveyors identified in the SPDES permit application or renewal shall be included in the project description as set forth when announced in the environmental notice bulletin.
For the purposes of this section "public water purveyor" shall mean any person, partnership, public or private corporation, municipality, or public authority which sells water derived from a sole source aquifer to at least five service connections or at least twenty-five individuals.
N.Y. Envtl. Conserv. Law § 17-0828