A water quality monitoring station on the Yoho River at Yoho Crossing (and Kicking Horse River station near Field) are operated by Environment Canada in partnership with Parks Canada. The Canadian Council of Minister’s metric of Water Quality Index (WQI) is a unitless value between 0 and 100. Once the WQI value has been calculated, water quality is classified to Excellent, Good, Fair, Marginal, Poor. For each 3-year period an indicator of change from one period to the subsequent period is assessed.