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Geographic Information System
for Breast Cancer Studies on Long Island (LI GIS)


The LI GIS contains maps that display information about relative breast cancer incidence by ZIP Code in Nassau and Suffolk counties (Long Island), NY, on which users can view data about relevant environmental exposures.

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The maps are for illustrative purposes only; map observations alone cannot prove cancer causation. Proximity to hazardous waste sites and pesticides has NOT been found to be associated with risk of breast cancer on Long Island. These maps cannot provide insight on an individual's risk for breast cancer.

For example, information about inactive and active hazardous waste sites on Long Island and detections of pesticides (insecticides, fungicides, and herbicides) in water supply wells in Suffolk County is displayed along with breast cancer relative incidence by ZIP Code. The maps enable users to visualize relative breast cancer incidence and clusters, and to examine possible relationships between exposures coinciding with disease incidence.

Approved researchers are able to access additional data which can be used to explore possible relationships between environmental exposures and disease incidence, such as topographic data, including locations of roads and water features that serve as reference points; demographic data, including the age, race, sex, and income of the population; health outcome data, including relative breast cancer incidence and health facilities data; environmental data, including land use and cover; water use and potential sources of water pollution; chemical releases into water, air, and soil; information on toxic chemicals and hazardous and municipal waste; and radiation. Review basic GIS map terminology if you need assistance with some of the terms on this site.