Map 4: Number of Children Under Age Six Years Newly Identified with Blood Lead Levels ≥ 10 mcg/dL by County, 2005, New York State Excluding New York City.

Map 4 groups counties into clusters defined by the number of incident cases of BLLs ≥10 mcg/dL among children under age six years in 2005. The total number of incident cases in New York State, excluding New York City, for 2005 was 2,283. The map graphically depicts the variation in incidence among counties across the state. County clusters were established based on the natural break statistical method, which groups county-level incidence values into categories that optimize both the similarity of values within each category and the differences in values between categories. Counties with the highest number of incident cases of childhood lead poisoning in 2005 are highlighted in the darkest shade of blue, while those with the lowest number of cases are highlighted in the lightest shade.

As shown on Map 4, seven counties fall within the cluster of highest number of annual incident cases. The majority (61.1% of cases outside of New York City) of children newly identified with BLLs ≥ 10 mcg/dL resided in Albany, Erie, Monroe, Oneida, Onondaga, Orange, and Westchester counties.