The Federated Indians of Graton Rancheria casino resort next to Rohnert Park will be connected to the city's sewer system under a deal approved by the City Council Tuesday.
"It is the environmentally superior alternative," Mayor Jake Mackenzie said of the plan, which means the tribe will not build its own wastewater treatment plant or dispose of treated water on its Wilfred Avenue reservation.
But residents criticized the arrangement, saying it was put together too quickly and adopted without enough thought.
"It is going too fast," said Eunice Edgington.
The agreement, approved 4-0 by the council, is designed to protect the city's groundwater supplies and guard against other impacts, such as "objectionable odors" from wastewater treatment on the site, said city officials, who proposed it to the tribe.