Human activities around Lake Tasoh such as industrial, agricultural, quarrying and municipal activities contribute to the changing water and environmental quality of man-made lakes located about 17km from the town of Kangar.

Although the level of water and environmental pollution in the catchment is not serious at the moment, it is feared that efforts will not be made by the authorities to conserve the area that is at the heart of integrated agricultural development while contributing to flooding control here.

The survey found that some of the visitors' irresponsible attitude toward dumping garbage into the water and the edge of the lake is not only eye-catching but can contribute to more serious water and environmental pollution.

President of the Malaysian Nature Society (MNS), Professor Dr Ahmad Ismail, said the study found that there was a decline in water quality in the Tasoh Dam which could affect the population and quality of the wildlife that feed water birds including migratory birds.

“Chemicals such as pesticides can also lower the water quality of the lake and can accumulate in the body of 'bentos' (animals at the base of the lake) and can then enter the digestive system including birds.

"Birds migrate to Lake Tasoh during winter in the northern hemisphere between October to March each year and their habitat provides food and shelter for migratory birds," he said here recently.

He said the suitability of Lake Tasoh Tasah as a bird habitat has led BirdLife International to recognize the area as an important habitat for birds or biodiversity.

“A total of 135 to 145 species of birds have been recorded in Tasah Tasah Lake. This is an important attraction for bird enthusiasts and photographers, ”he said, adding that Tasah Tasoh Lake is located along the EAAF (East Asian Australasian Flyway), an important migration route from eight routes in the world.

Meanwhile, Tasah Tasoh Lake fisherman, who only wanted to be known as Pak Non, said the lake had been contaminated with rubbish for the past three years when visitors who had picnics and fishing threw away the junk they wanted.

"We are the fishermen community organizing a drain on the cleanliness of the lake but this morning clearing the edge of the lake is not full until the afternoon is full of rubbish. Sometimes I feel it is not worth it," he said. off.

He hopes the authorities take steps to educate the public to be more responsible and to keep the lake clean before it's too late