Housing of the Klong Mahawong Community at the Samrong Canal, one of the most polluted canals at the Chao Phraya River. Samrong Canal, in the Samut Prakan province, connects to the lower reach of Chao Phraya.

A recent Greenpeace report reveals high levels of toxic pollution in this canal. The study shows the presence of heavy metals, hormone disrupting chemicals, and human carcinogens in water and sediments.