Li seems to me that there ...
Li seems to me that there does not exist any international regulation concerning water. It is specific to each country. To the international level one limits oneself to say that one should not do this or that. Your question questions on water, but it should be known that there are several types of water. domestic waste waters, industrial waste waters, waste waters of chemical industry, waste waters of the stations of household wastes, waste waters of agriculture. Which interests you more. lyseconcept can give you information about domestic waste waters.