The New York Application for a Certificate of Approval of Plans to Interconnect Water Systems (DOH 351) is a form required by the New York State Department of Health (NYS DOH) for public water systems to interconnect with one another. It is used to ensure that the interconnection of two water systems complies with state and federal regulations and that the water is safe for human consumption. The application must be completed by the applicant and submitted to the local health department or the NYS DOH for review. The DOH 351 is divided into four sections: 1. Interconnection Information: This section provides details such as the interconnection location, type of interconnection, and the water system operators involved. 2. Water System Details: This section provides information about the two water systems, such as their source water, water treatment processes, and water sampling procedures. 3. Plan of Interconnection: This section includes details such as diagrams and schematics of the interconnection, as well as flow diagrams. 4. Certification: This section requires a signature from the applicant certifying that the plans for the interconnection meet all applicable state and federal regulations. The DOH 351 form must be submitted to the local health department or the NYS DOH for review and approval. After approval, the interconnection may be implemented.