3. Results
3.1. Water parameters
The data revealed considerable variation, including extreme values in water quality parameters between the study locations and sites. Based on the level to which the parameters fell below
or above the ASEAN Marine Water Quality Criteria (AMWQC) standard, generally they can be considered to range from poor to good condition at Phuket, Phi Phi and Surin, respectively (Table 3). Phuket has the highest nutrient concentration and turbidity levels, while Surin has the lowest.