(Left-column) FWZI of the H₂O 2₀₂–1₁₁ 988 GHz (top panel), 2₁₁–2₀₂ 752 GHz (middle panel) and 3₁₂–3₀₃ 1097 GHz (bottom panel) transitions as a function of the bolometric luminosity of each source. (Right-column) Same as left-column but versus the envelope mass of each YSO. The blue plus symbols correspond to the low-mass Class 0 protostars, the black triangles the low-mass Class I, the green asterisks to the intermediate-mass objects and the red crosses to the high-mass YSOs. The low- and intermediate-mass objects with detected EHV components are surrounded by a box, as well as the high-mass YSO with triangular line profiles. FWZI is calculated by binning the spectra to 3 km s^-1.