How Much Land Is Enough? N.Y.C. Ends Buying Spree of the Catskills.

Since 1997, New York City has purchased more than 1,800 properties to protect its drinking water. No longer.The largest single taxpayer in the Catskills is New York City.To protect its drinking water — 90 percent of which comes from Catskills watersheds — the city spent nearly three decades accumulating 156,350 acres of forest and fields.