The EEA's Circularity Metrics Lab (CML) uses a range of sources such as European datasets, national statistics, surveys, and novel dataflows to provide insights on progress towards the development of the circular economy. It is intended to complement other monitoring frameworks by presenting additional evidence on circularity, including metrics focussed on the implementation of circular principles and practices.

The circularity metrics are grouped in four categories as shown below:

The thematic modules are groups of circularity metrics on a specific topic: