Oxygen 1s for Organic Compounds

Figure 1. Oxygen 1s binding energy means and ranges for various organic compound types. Plotted from data supplied in reference [1].

Additional Note: 
C-OH (aliphatic): Average 532.9 eV, Min. 532.7 eV, Max. 533.1 eV
C-OH (aromatic): 533.6 eV 

Reference:
[1] G. Beamson, D. Briggs, High Resolution XPS of Organic Polymers - The Scienta ESCA300 Database, Wiley Interscience, 1992, Appendices 3.1 and 3.2.