Pasadena Groundwater Storage Program

Pasadena Groundwater Storage Program

The Pasadena Groundwater Program (PGSP) is a conjunctive use program between Metropolitan Water District of Southern California (MWD), Pasadena Water and Power (PWP), and Foothill Municipal Water District (FMWD) to improve reliability of water supply to the City of Pasadena (the City or Pasadena) and surrounding water agencies and to reduce dependence on imported MWD water deliveries during periods of drought or emergency conditions. Under the project, water would be stored in the Raymond Groundwater Basin through in-lieu recharge (reduced pumping of groundwater with surface water supply offset) and through the direct injection (using aquifer storage and recovery 'ASR' wells) of water that has been treated at the Weymouth Water Treatment Plant. The PGSP would store up to 66,000 acre-feet (AF) of water in the Pasadena Subarea of the Raymond Basin over a four year period at a rate of up to 16,500 acre-feet per year (AFY) when imported water supply is plentiful. The water would then be extracted at a rate of up to 22,000 AFY when imported supplies are limited due to a drought or emergency. Stored groundwater in the conjunctive use account would be used to offset firm demands of PWP and FMWD on MWD at their service connections. Program operation would be monitored and regulated by the Raymond Basin Management Board (RBMB or Watermaster) to ensure no harm to the basin parties.

Pasadena

Los Angeles

California Department of Conservation (DOC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 7 (DOT), California Highway Patrol, California Regional Water Quality Control Board, Los Angeles Region 4 (RWQCB), Department of Water Resources, Office of Emergency Services, California, Resources Agency, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance, California Native American Heritage Commission (NAHC), California Department of Health Care Services (DHCS)

California Native American Heritage Commission (NAHC), California Department of Health Care Services (DHCS)

Water Facilities

Conjunctive Use

Aesthetics, Air Quality, Cultural Resources, Cumulative Effects, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Transportation, Vegetation, Wildlife