Hazardous Waste: Compliance With Groundwater Monitoring Requirements at Land Disposal Facilities

Pursuant to a congressional request, GAO provided information on the Environmental Protection Agency's (EPA) groundwater monitoring requirements for hazardous waste land disposal facilities, focusing on the number of facilities that: (1) are subject to groundwater monitoring requirements; (2) have monitoring systems in place; (3) have released pollutants into the underlying groundwater; (4) have initiated corrective actions; and (5) have been issued citations for groundwater monitoring violations.