The Village of Hanover Park wastewater treatment facility at 5600 Greenbrook Blvd. was originally constructed in the early 1970s and has undergone several major expansions and rehabilitations. The last major rehabilitation occurred roughly 20 years ago, and the UV disinfection equipment on site today dates to the 1997 expansion. The project includes removing and replacing the three Trojan 3000 units with two Trojan 3000+ units. This project received a grant from the USEPA for roughly 72% of the construction costs, and construction will begin in the Spring of 2024.