The Water Quality Index (WQI) is a tool to provide consistent procedures for Canadian jurisdictions to report water quality information to both management and the public.  The CCME WQI documents are also included in the Canadian Environment Quality Guidelines.

There are three parts to the CCME WQI:

• A technical report describing how the index was developed.
• A user's manual outlining how to use the index.
• A user-friendly program that calculates index values based on information input by the user.