REGION — This October marks the 100th anniversary of the date when people in all five New York City boroughs celebrated receiving some of the cleanest unfiltered water in the world from the Catskill Mountains through a complex network of aqueducts, reservoirs and tunnels.

For all its benefits, the creation of the system was a hardship to many Catskill families who were relocated, losing their homes, land and communities to accommodate excavation and construction of the water supply system. To honor that sacrifice, Radical Joy for Hard Times is hosting a social media campaign titled “Raise a Glass to 100 Years of Catskill Water.” From now through October 14, people throughout the watershed are invited to take photos of themselves and others raising a glass of clean New York City water to toast and to thank the people of the Catskills for the gift of clean drinking water. They can be tagged @CatskillsWater on Instagram, Facebook and Twitter and use the hashtags #RaiseAGlass #NYC DrinkingWater and #PostYourToast.

Submitted photos will be included in a commemorative book that Radical Joy for Hard Times will give to descendants of displaced Catskill families.