Renovating sewage effluent by groundwater recharge

In the Salt River Valley, in central Arizona, the performance of a system for renovating waste water by groundwater recharge depends upon the local conditions of climate, soil and groundwater. The hydrological conditions in Salt River Valley, central Arizona are favorable for groundwater recharge with infiltration basins in the river bed. It is estimated that tertiary treatment by this method would cost about $5 per acre foot or less than one-tenth of equivalent in-plant treatment. This would be an additional source of water to meet future agricultural and other demands.