The tuen mun river is a major watercourse that in the 1980s suffered from a wide range of pollution sources , including effluent discharged from livestock farms , unsewered villages , cottage industries , and expedient connections . further east , the pai min kok stream running into the sea at anglers beach was primarily affected by livestock waste , while the sam dip tam stream , closer to tsuen wan , was moderately polluted by industrial effluent 屯门河是区内主要水道，八十年代期间受不同的污染影响，其中包括禽畜农场无污水管道的村屋家庭工业及非法接驳排污渠等屯门河以东的排棉角溪流入钓鱼湾，污染源主要来自禽畜废物荃湾附近的三
