This measure is calculated using information from the Department of Mines, Minerals and Energy’s gas and oil automated enforcement system. Records of violations show whether there was any off-site damage or public safety hazard related to a violation of the Virginia Gas and Oil Act or the department’s gas and oil regulations. The number of sites with no violations causing off-site impacts is calculated as a percentage of permitted gas and oil sites. The percentages for the most recent five years are then averaged.