U.S. Water News Online
SAN DIEGO -- An invasive mussel has spread to another reservoir in San Diego County.
Water officials say a "significant population" of the quagga mussel were found Miramar Reservoir in Scripps Ranch, becoming the fifth reservoirs in the county infested with the tiny shellfish.
Water officials plan to increase inspections of watercraft used at Miramar Reservoir. The mollusks often spread by attaching themselves to boats.
Ever since the mussels were first detected in the summer, officials have been worried they could have a foothold in all of the region's reservoirs that are connected to the imported water supply system.
Quaggas, which are native to Ukraine, are environmentally dangerous invaders.
They're impossible to eradicate once they become established in a reservoir, lake or other body of water. They clog pipes and screens at power stations, water treatment plants and agricultural irrigation lines. They also foul pumps and motors exposed to water.
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