• The lobby of San Antonio Water System headquarters in San Antonio, featuring an 11-foot model of a low-flow toilet. The lobby of San Antonio Water System headquarters in San Antonio, featuring an 11-foot model of a low-flow toilet.

    The lobby of San Antonio Water System headquarters in San Antonio, featuring an 11-foot model of a low-flow toilet. Gabriel Cristóver Pérez

  • A tour group samples treated wastewater at the Dos Rios Water Recycling Center, operated by the San Antonio Water System.  A tour group samples treated wastewater at the Dos Rios Water Recycling Center, operated by the San Antonio Water System.

    A tour group samples treated wastewater at the Dos Rios Water Recycling Center, operated by the San Antonio Water System. Gabriel Cristóver Pérez

  • The recycled water outfall on the site of the Dos Rios Water Recycling Center outside of San Antonio. The recycled water outfall on the site of the Dos Rios Water Recycling Center outside of San Antonio.

    The recycled water outfall on the site of the Dos Rios Water Recycling Center outside of San Antonio. Gabriel Cristóver Pérez

  • Greg Eckhardt of the San Antonio Water System speaks to visitors during their tour of a SAWS facilities. Greg Eckhardt of the San Antonio Water System speaks to visitors during their tour of a SAWS facilities.

    Greg Eckhardt of the San Antonio Water System speaks to visitors during their tour of a SAWS facilities. Gabriel Cristóver Pérez

  • San Antonio Water System President and CEO Robert Puente speaks at the SAWS headquarters in San Antonio. San Antonio Water System President and CEO Robert Puente speaks at the SAWS headquarters in San Antonio.

    San Antonio Water System President and CEO Robert Puente speaks at the SAWS headquarters in San Antonio. Gabriel Cristóver Pérez

  • A cascade aerator on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. A cascade aerator on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir.

    A cascade aerator on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. Gabriel Cristóver Pérez

  • A cascade aerator is shown at the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. A cascade aerator is shown at the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir.

    A cascade aerator is shown at the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. Gabriel Cristóver Pérez

  • A cascade aerator on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. A cascade aerator on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir.

    A cascade aerator on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. Gabriel Cristóver Pérez

  • A sludge thickener on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. A sludge thickener on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir.

    A sludge thickener on the site of the Twin Oaks Valley Water Treatment Plant outside of San Antonio, where the San Antonio Water System maintains an underground storage reservoir. Gabriel Cristóver Pérez

  • Twin Oaks Valley Water Treatment Plant manager Roberto Macias speaks to visitors during a tour of the San Antonio Water System facilities. Macias is head of SAWS' underground storage reservoir system. Twin Oaks Valley Water Treatment Plant manager Roberto Macias speaks to visitors during a tour of the San Antonio Water System facilities. Macias is head of SAWS' underground storage reservoir system.

    Twin Oaks Valley Water Treatment Plant manager Roberto Macias speaks to visitors during a tour of the San Antonio Water System facilities. Macias is head of SAWS' underground storage reservoir system. Gabriel Cristóver Pérez