Does IRWD’s drinking water contain TCE?
No. TCE has never been detected in the drinking water served to any IRWD customers. IRWD obtains drinking water from two sources: 1) water imported by the Metropolitan Water District of Southern California from the Colorado River or Northern California, and 2) locally-available groundwater. Most of IRWD’s groundwater supplies are obtained from its Dyer Road Wellfield, which consists of 18 drinking water wells located in Santa Ana. IRWD does not have any drinking water wells that are located in the TCE plume emanating from the former El Toro Marine Corps Air Station (ETMCAS). IRWD’s Dyer Road Wellfield is nearly 3.5 miles from the leading edge of the ETMCAS plume. TCE has never been detected in the IRWD drinking water distribution system, which is routinely tested for TCE. In addition its standard testing protocol, IRWD has performed specific testing on five separate occasions since May 2006 at seven locations throughout the Woodbridge area; no TCE was detected in IRWD’s drinking water.
