CONAGUA, Mexico’s national water commission, and OOMSAPAS Los Cabos, the municipal water and sewer utility, have started a three-month project to modernize wastewater treatment in San José del Cabo. The work centers on building a pressurized pipeline and new pumping station along Avenida Centenario to connect with the Sonoreña treatment plant.
The project will consolidate operations now split between two facilities: the older Fonatur plant and the Sonoreña plant. Once the new pipeline is operational, the Fonatur plant will be decommissioned. Officials say the consolidation will reduce sanitation risks and improve treatment capacity for the growing Los Cabos corridor, according to the Los Cabos municipal government.
Drivers should expect traffic disruptions on Avenida Centenario for the duration of the three-month construction window. Centenario is a major route through central San José del Cabo, connecting the downtown area to residential neighborhoods on the city’s north side. No detour plan has been announced publicly.
Water infrastructure has been a persistent concern across southern Baja California Sur. Los Cabos relies on a patchwork of municipal supply, private desalination plants, and trucked water to serve a population that swells dramatically during tourist season. An estimated 30 private desalination plants now operate in the Cabo area, many built by individual hotel and residential developments that run independently from the municipal grid. The local government has also approved an expansion of its own desalination capacity, though timelines for that project remain unclear.
The wastewater upgrade addresses the other side of the equation: what happens to water after it is used. Aging treatment infrastructure in a region adding thousands of hotel rooms and homes each year creates real public health and environmental pressure, particularly for the estuary and coastline near San José del Cabo. Residents along Avenida Centenario should plan for construction-related delays through roughly the next three months.