What is the EPA's Position on Fly Ash?

 Does the EPA Consider Fly Ash a Hazardous Waste?
The U.S. Environmental Protection Agency has reviewed extensive studies on fly ash for health and environmental risks and has examined coal ash samples collected from power plants around the country. In 1993, the agency determined that power plant coal ash is nonhazardous and should be regulated accordingly.
Does the EPA Endorse the Use of Fly Ash?
The U.S. Environmental Protection Agency encourages the use of coal combustion products in projects such as in concrete, road base, embankments, flowable fill, and other beneficial applications. The increased use of these materials, which would otherwise be discarded as waste, can reduce greenhouse gases in the atmosphere, reduce energy consumption, and conserve natural resources. Some applications, such as road embankments and other non-encapsulated (loose) uses, may require the evaluation of local hydro-geological conditions to ensure protection of human health and the environment.
Studies and research conducted or supported by EPA, Electric Power and Research Institute (EPRI), government agencies, and universities indicates that the beneficial uses of coal combustion products have not been shown to present significant risks to human health or the environment. As with many other common substances, precautions and sound management practices should be applied when using coal combustion products. In most cases, however, the way that coal combustion products are used, the engineering requirements for that use, and the handling and management methods applied minimizes risk of exposure.