Agua Prieta, Sonora, Mexico

Expansion of the Wastewater Collection System in Agua Prieta, Sonora

Status: Completed


Water and sewer service coverage in Agua Prieta is estimated at 98% and 75%, respectively. Residents whose homes are not connected to the sewer system dispose of their wastewater in latrines and cesspools, which pose a serious risk for contamination of groundwater sources, as well as the transmission of diseases associated with untreated wastewater.

Collected wastewater is currently treated by means of a facultative lagoon system with a design capacity of 200 liters per second (lps) or 4.56 million gallons a day (mgd). It is estimated that the wastewater system currently collects 145 lps (3.30 mgd). Approximately 86% (125 lps or 2.85 mgd) of the treated effluent is conveyed to the local power company for reuse, while the rest is discharged into in the Agua Prieta creek.

The water utility is proposing to expand the sewer system to the southeast area of the city, which currently does not have service. With this project, wastewater collection coverage will be increased to 80%.


The purpose of the project it to expand the sewer system to the southeast area of the city. The main construction components consists of installing:

  • 41,729 feet of pipeline, and
  • 778 sewer hookups


Implementation of this project will provide first-time wastewater services to an unserved area of the city, thus reducing the potential for groundwater and surface water contamination, as well as health risks associated with raw sewage flows.

Project Financing

Total Project Cost US 0.65M
NADBank Funding US 0.24M - NADBank Grant: BEIF
Other Funding Partners Organismo Operador Municipal de Agua Potable, Drenaje, Alcantarillado, Tratamiento y Disposición de Aguas Residuales del Municipio de Agua Prieta, Sonora (OOMAPASAP)
City of Agua Prieta