The Agua Hedionda Lagoon ("agua hedionda" means "fetid water" in Spanish) is a lagoon in Carlsbad, California, that is fed by the . Stewardship of much of the lagoon is held by the Encina Power Station and its owner NRG Energy. In November 2000 the Agua Hedionda Lagoon was designated as a critical habitat for the tidewater goby.