This dataset includes raw data for the results presented in the article "Surface-Controlled Water Flow in Nanotube Membranes" and specifically for permeance data (Figure 5 in the article), Raman and X-ray photoelectron spectroscopy (XPS) (Figure 2 in the article), surface zeta potential calculation and additional micrography as applied to carbon nanotube (CNT) and carbon nitride nanotube (CNNT) membranes.