Threshold Planning Quantity in the United States

Threshold Planning Quantity (TPQ) in Environmental Law

The amount of extremely hazardous substances that triggers a reporting requirement under the Emergency Planning and Community Right To Know Act. The TPQ varies from one to ten thousand pounds, depending on the substance.

Companies that have the TPQ of a substance must report to the state emergency response commission and the local emergency planning commission within sixty days of becoming subject to the requirement. They must designate a facility representative and work with the agencies to develop emergency response plans. The main concern of the community is the ability to respond to all possible releases that may threaten the public. Without the information, it cannot plan properly.
Based on “Environment and the Law. A Dictionary”.