agreement with the ANOVA results of factorial design 2 2 , the interaction of X1 (Number of cycles of growth associated with sedimentations) and X2 (Steeping time of the TiO2) did not have a significant effect on the glass adhered milligrams of TiO2 (p = 0,138). Nevertheless, X1 factor in its high level (Two cycles made up of: 2 sedimentations of 1 h and 2 calcinations of 1 h to 450 oC) results in a significant effect (p < 0.0001) adhering 7.42 mg/cm 2 of TiO2 on the glass substrate . The films displayed a rough, irregular surface and presented small fractures. The X-ray diffractograms of these were TiO2 films showed the presence of the phases rutile (110), (101) and anatase (101), (200), (211) and (004), which intensified after the heat treatment. In the photocatalytic curves the results were 26 %, 40 % and 60 % the colour, COD and faecal coliforms removal respect at 12 h.