The researchers studied the water quality of Bukit Ekspo Lake to see if it's good for water-based fun and if it can clean up wastewater. They checked different things like pH, oxygen levels, and pollutants like ammonia. Results showed that the water needs a lot of help and isn't safe for recreation. The lake can't clean itself up, and the water in the inlet is dirtier than the outlet. That means the lake isn't ready for water activities and can't clean up wastewater on its own. To make the lake safe for fun times, it needs lots of treatment to improve the water quality.