Salem uses fluoridation chemical that Portland's hotly debating

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Geren Island Water Treatment Facility
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Geren Island Water Treatment Facility
Geren Island Water Treatment Facility operations maintenance supervisor Tim Sherman, left, explains to KATU Web Producer Steve Benham that the monitors on the wall measure the pump flow of fluorosilicic acid. On this day, Friday, May 10, 2013 the flow was about 4.5 gallons an hour. (Photo: Gino Corridori/KATU News)