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PORTLAND Multnomah County commissioners came out in support of the City of Portland s plan to fluoridate drinking water Wednesday.

The commissioners cited a Centers for Disease Control 2011 study that attributed $38 in dental treatment savings for every $1 spent on fluoridation.

Mayor Sam Adams announced last week that he would join commissioners Randy Leonard and Nick Fish in supporting the effort.

That gives supporters of fluoridation a majority on the five-member council.

Opponents of the plan say fluoride is an industrial byproduct that contains arsenic, lead and mercury, which can lead to neurological problems.

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