The scientists looked at the water quality of Titiwangsa Lake to see if it could be used as a water source. They tested the water at two locations, checking for things like temperature, pollution, and oxygen levels. After testing 16 different factors, they found that the lake's water is good enough for swimming and other recreational activities. But they also found that things like water sports, picnics, and algae growth could make the water dirty over time. To keep the lake clean, they suggest taking steps to prevent pollution from happening in the future.