Comparison with AMWQC water quality standards indicates that all water parameters in the dry season, except for phosphate
and total suspended solids at Phi Phi and Surin, were below the standards (i.e. in acceptable condition). Conversely, in the wet sea-son, all water quality parameters, except dissolved oxygen and ni-trite, were at unacceptable levels (above the standard values),particularly for phosphate and total suspended solids at Phuket (Table 3).