The NEB has very specific criteria for what constitutes a pipeline incident and thus is considered reportable to the regulator. It includes:

A term the NEB no longer uses when classifying types of pipeline safety-related events. The board put a “do not use” label on it to remind staff that this category should not be selected.

Another term the NEB no longer uses in its database collection. This was used when a piece of equipment malfunctioned, often resulting in a leak. Fatality: Pipeline companies must provide information [..]

Any time a fire or explosion is unintended it must be reported to the NEB.

This category for reportable incidents can include any incidents such as a spill of a non-product like produced water or a pipeline operated beyond its design, such as pressures that are too high.

This term is used whenever a pipeline suffers a “loss of containment” and is unable to operate.

This refers to anytime a pipeline company's product is unintentionally released. That can be anything from exhaust to a spill. However, not all releases must be reported. It depends on whether it [..]

Pipeline companies must only report an injury if it involves a serious injury, defined as suffering a major bone fracture, a body part amputation, loss of sight in one eye or both, internal haemorrhag [..]

This includes products such as oil, synthetic oil and heavy oil that flow through pipelines in liquid form.

This includes more volatile products such as propane, butane and other natural gas liquids that can quickly convert to gaseous form at atmospheric pressure.