Dedicated to the open sharing of information and ideas on the economy, ecology, science, and legal equities of fly ash - one of the planet's most abundant materials.
Is Fly Ash Landfilled?
Although the chemical and physical properties of fly ash make it ideal for a variety of beneficial applications, it must compete against other inexpensive bulk materials such as sand and gravel, and therefore is economic only where transportation and handling costs can be kept low. As a result about 60% of the fly ash produced in the United States is not recycled for commercial use, but rather is placed in specially designed, permitted landfills.
Several studies over the past 15 years have shown that the use of coal combustion products in construction projects has resulted in little to no impact on groundwater and surface water quality, but some precautions are necessary. The use of engineering standards and guidelines will help ensure that the use of coal combustion products does not negatively impact the environment.
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?
Historical Uses of Fly Ash