A computer-implemented system and method for detecting an anomaly in a pipeline carrying fluids using a Pipeline Inspection Guage (PIG). Provided is a PIG configured to be placed into a fluid within the pipeline including one or more pressure measuring devices configured to receive pressure signals indicative of the one or more pressure parameters within the fluid flowing through the pipeline when the PIG is placed within the pipeline. The PIG includes a computer processor configured to provide detected pressure signals to an edge computing device for comparing the pressure signals to one or more anomaly detection thresholds to determine whether an anomaly event (e.g., a leak) is detected in the pipeline. The PIG computer processor preferably automatically generates an event report upon detection of an anomaly even, and may automatically issue an alert in the form of an event summary describing the anomaly.