From: Current practices in spatial analysis of cancer data: data characteristics and data sources for geographic studies of cancer
Dataset name
Source Agency
URL
Geographic Resolution
Agricultural Chemical Use
USDA
http://usda.mannlib.cornell.edu/usda/usda.html
State
California Pesticide Use Reporting database
California Department of Pesticide Regulation
http://www.cdpr.ca.gov/docs/pur/purmain.htm
Public Land Survey Section (approximately one square mile)