Just found this tidbit on how Bethpage Black is Audubon Certified and uses effluent water for irrigation, right on! Bethpage Green has been playing with reduced pesticide rates for a while with the help of Rossi and Jennifer Grant, check out this link and this one too.
Easy to see the natural beauty of the site in this video.
Here are some effluent links for your reading pleasure, most are pro's, but the last one describes one of the con's, all good reads.
Using Effluent Water on Your Golf Course - MSU Turf Library
Waste Water Reuse for Golf Course Irrigation - The book
Effluent Water Encourages Turfgrass Growth - University of Florida Turfgrass Department Study
Effluent Study - Case Study - Foliar Damage Associated with Effluent Use on Mixed Landscapes