According to Pennyslvania's Oral Health Report
http://www.dsf.health.state.pa.us/health/lib/health/oralhealth/OralHealthInPAReport.pdf

For 15-year-olds

58% have cavities in fluoridated Philadelphia
71% have cavities in fluoridated Pittsburgh
49% have cavities in 53% (in 2002) fluoridated Pennsylvania

Excerpt: "Compared to the state total, [fluoridated]Pittsburgh seems to shows significantly higher numbers of 15 year olds with any caries experience than the rest of the state"

For 6-8 year-olds

46% have cavities in fluoridated Philadelphia
48% have cavities in fluoridated Pittsburgh
48% have cavities in only 53% fluoridated Pennsylvania


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See how they spin or twist this data:


"The positive effect of water fluoridation is further demonstrated in the results from the Pennsylvania Oral Health Needs Assessment, which reported that water fluoridation wasassociated with a 22 percent reduction in caries rates among children and a 28 percent lower rate of untreated decay according to parental survey data as to whether the child was exposed to fluoridated water."

http://www.dsf.health.state.pa.us/health/lib/health/oralhealth/FinalStrategicPlan.pdf#search=%22CDC%20caries%20Pennsylvania%22