Somerton, Arizona, USA

Construction of a Wastewater Treatment Plant in Somerton, Arizona

Status: Completed

Pre-project Conditions

The existing wastewater treatment facility with an average capacity of 0.6 million gallon per day (mgd) did not provide adequate treatment to flows generated by the city of Somerton and was unable to meet Arizona Pollutant Discharge Elimination System (AZPDES) permit requirements consistently. Between January 1998 and July 2001, there were 12 AZPDES permit violations relative to concentrations of biochemical oxygen demand (BOD5) and total suspended solids (TSS) in the facility’s effluent. 

Project Scope

The project consisted of constructing a sequencing batch reactor (SBR) wastewater treatment plant (WWTP) with a total capacity of 0.8 mgd to replace the existing lagoon system

Project Benefits

The new plant improved effluent discharges to the Yuma Drain Canal and the underlying groundwater aquifer by reducing the levels of BOD5, TSS and total nitrogen in compliance with U.S. standards for wastewater treatment.

Project Financing

Total Project Cost US 6.17M
NADBank Funding US 3.94M - NADBank Grant: BEIF
Other Funding Partners Water Infrastructure Finance Authority (WIFA)
City of Somerton, Arizona