This Federal Facility Compliance Agreement between US EPA and the Bureau of Indian Affairs (BIA) is to address BIA's past violations of the Clean Water Act at its Wastewater Lagoon facility (the Facility) in Keams Canyon, Arizona. Under this Agreement, BIA will upgrade the Facility to operate as a non-discharging wastewater treatment facility and will complete all construction and commence operation of the upgraded Facility by April 20, 2018.