The proposed Monterey Peninsula Groundwater Replenishment for the Monterey Peninsula Water Supply Project is to be modeled after the highly successful Orange County Groundwater Replenishment System (GwRS) which has safely provide purified water for 35 years.
Modeling Success in Orange County, California:
Additional Groundwater Replenishment Projects
West Basin Water District, California. Online since 1995, the district uses microfiltration, reverse osmosis and ultraviolet light technologies to treat recycled water for groundwater injection.
Los Angeles County, California. The Water Replenishment District of Southern California has managed the Montebello Forebay Groundwater Recharge Project since 1962. It is one of the oldest ongoing natural groundwater recharge sewer projects in the nation.
The Montebello Project filters an average of 45 million gallons per day of treated sewer water through the ground into the Los Angeles Central Groundwater Basin. The reclaimed water constitutes an average of 18.7 percent of the groundwater supply.
Sanitation Districts of Los Angeles County. The Sanitation Districts of Los Angeles County utilize recycled water from three of their wastewater treatment plants for groundwater recharge.
San Bernardino County, California. Recycled water from one of the Inland Empire Utilities Agency’s (IEUA) treatment plants is currently used to recharge the Chino Basin aquifer at the rate of 500 acre-feet per year and is scheduled to increase to 2,300 acre-feet per year in the future.
Reno, Nevada. The Tahoe-Truckee Sanitation Agency Water Reclamation Plant combines conventional activated sludge secondary treatment with biological phosphorus removal to treat the wastewater. The treated water is released into the Truckee River, which is the source of the City of Reno’s water supply.
Las Vegas, Nevada. Since the 1950s, secondary treated wastewater has been discharged into the Las Vegas Wash and represents two percent of the flow into Lake Mead, tthe primary drinking water source for the Las Vegas Valley.
El Paso, Texas. The Fred Hervey Water Reclamation Plant recovers and treats wastewater, which is then injected into groundwater. The water eventually travels to one of El Paso’s potable water fields to become part of the drinking water supply. In 2004, a total of 577 million gallons of reclaimed water were returned to the Hueco Bolson aquifer.
Scottsdale, Arizona. Since 1998, the Scottsdale Water Campus has produced 12 million gallons per day of tertiary treated wastewater that is used primarily for use on parks, medians and golf courses. In winter, when irrigation is reduced, 10 million gallons per day undergo advanced purification to meet or surpass drinking water standards before the water is used to recharge groundwater sources.
City of Peoria, Arizona. The city currently recharges 2,000 acre-feet of water per year from their Beardsley Water Reclamation Facility.
City of Glendale, Arizona. Reclaimed water is being used directly on landscaping and being stored in the aquifer.
Fairfax, Virginia: Upper Occoquan Sewage Authority (UOSA), Millard H. Robbins, Jr. Water Reclamation Plant. Since UOSA came on-line in 1978 to replace 11 secondary wastewater treatment plants that were decommissioned, the quality of water in the Occoquan Reservoir has dramatically improved and is generally much higher than that of the receiving stream.
NEWater Facilities, Singapore. The latest ultrafiltration/microfiltration and reverse osmosis membrane technologies, followed by ultraviolet disinfection, treat used water to standards higher than the drinking water standards of the World Health Organization and the U.S. Environmental Protection Agency. The project has been fully operational since 2003.
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