IRVINE RANCH WATER DISTRICT WATER SOURCES
Where does your water come from? IRWD water comes from local groundwater, recycled water, local surface water (rainwater capture), and from imported water from Northern California and the Colorado River. Recycled water is not used for drinking but is an important water source that reduces demand for drinking water.
Shasta Lake
Lake Oroville
SACRAMENTO- SAN JOAQUIN RIVER DELTA
SACRAMENTO
SAN FRANCISCO
STATE WATER PROJECT (imported water)
GROUNDWATER BANKING
COLORADO RIVER AQUEDUCT (imported water)
PACIFIC OCEAN
LOS ANGELES
Lake Mathews
LOCAL GROUNDWATER
ORANGE COUNTY IRWD SERVICE AREA
SAN DIEGO
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IRWD Water Quality Report 2026
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