To evaluate the water loading effect irrespective of a particular Tsite, Table presents the chemical shifts averaged across all T-sites for each water loading, employing multiple chemical shift predictors. Interestingly, all the tested methods except Lippmaa's approximation span a similar range of chemical shift and exhibit similar trends, such as a mild increase (1-2 ppm) in chemical shift upon increasing the water loading from one to two water molecules per unit cell and a minor decrease (up to 1 ppm) in the shift going from two to seventeen waters per unit cell. These observations suggest that the trends are likely general and that they primarily stem from geometry variations in the immediate vicinity of the Al center, i.e., from variation in the T-O-T angle and Al-O bond lengths, despite the fact that these local geometry variation can be a consequence of more complex processes taking place far away from the Al center.