Raw untreated storm water flooded Santa Monica Beach, Sunday, June 20, 2021. The water pump sensors at the Pico storm drain malfunctioned and resulted in the flooding. Water from dry weather runoff and stormwater is treated at the Santa Monica Urban Runoff Recycling Facility (SMURRF) to provide recycled water for toilet flushing and irrigation. This water supply reduces ocean pollution and is sustainable and drought resilient. The Santa Monica Water Treatment Plant treats water from three City groundwater well fields – Charnock, Olympic and Arcadia – to provide 8½ million gallons of drinking water each day to its 89,000 residents. The Santa Monica Water Treatment Plant implements a water treatment system to remove groundwater contamination from the Charnock groundwater sub-basin and restores this resource as a water supply for the City. The treatment system uses filtration with granular activated carbon to treat water from the three contaminated wells at the Charnock Well Field. The project also provides upgrades to the existing water treatment plant including construction of new systems for drinking water disinfection, softening and fluoridation. Local groundwater is pumped and treated at the City's Arcadia Water Treatment Plant.