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3%) showed excellent school performance, 162(40.5%) good, 113(28.3%) fair and 40(10%) showed poor performance. Significant negative association was found between school performance and mean blood lead level (p0.05). No significant difference was found in terms of gender and age with school performance of both regions. Majority of school going children in northern Pakistan were found to have lead levels ≤ 5µg/dL which is a level of concern as it is inversely related to academic performance. Majority of school going children in nor