Table 4: p-values for HPC, mold, yeast, total coliform, thermotolerant coliform, and S. aureus, in drinking water samples by brand, years and region between January 2008 and December 2015.

Parameters Brand Years Regions
Mold 0.448 0.544 0.177
Yeast 0.998 0.014 0.920
HPC 0.001 0.001 0.008
total coliform 0.999 0.087 0.964
thermotolerant coliform 0.998 0.003 0.998