The results were as follows: Area 12 year-old children 15 year-old children n Prevalence CFI n Prevalence CFI Strata 1 358 6.1% 0.13±0.46 322 9.9% 0.18±0.53 Strata 2 707 26.4% 0.51±0.91 690 27.0% 0.49±0.85 Strata 3 296 43.2% 0.81±0.99 274 37.6% 0.66±0.91 p= 0.000 p= 0.000 Conclusion: The results of this study indicate that the prevalence and severity of enamel fluorosis in 12 and 15 year-old children were significantly higher in fluoridated areas, with CFI borderline score in Strata 2 and slight score in Strata 3.