And dodgy plumbers who direct sewerage straight into the storm water pipes because it is easier and cheaper and nearly impossible to detect.
Pattaya has nationalities visiting from all around the world which results in the water in Pattaya Bay being a unique soup of Indian, Chinese, Thai, Arab and farang fecal matter, urine, period blood and sperm for the tourists to enjoy.
Especially the Walking Street end with the toilets sitting above the sea.