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Filtration Avoidance Determination (FAD) Reports

The Catskill/Delaware portion of the New York City water supply has met the criteria for waivers from the filtration requirements of the SWTR from January 1993 to the present. Filtration Avoidance Determinations were granted by the USEPA in January 1993, December 1993, January 1997, May 1997, November 2002 and July 2007. In 2014, NYSDOH granted the Revised 2007 FAD and the 2017 FAD was issued December 28, 2017.

The documents on this page were prepared to report on the development, progress and achievements of DEP’s source water protection programs established to maintain the FAD for the Catskill/Delaware portion of the New York City water supply.

Filtration Avoidance Determinations

FAD Reports






Previous Years

Reservoir Levels

Current: %

Normal: %