If you add the valences of each atom in the molecular formula for arsenious acid, H 3 AsO 3, you can see that the molecule, which is uncharged, has a total valence state of 0 (3x(+1) for the hydrogen atoms; 1x(+3) for the arsenic(III) atom; 3x(-2) for the oxygen atoms = 3+3-6 = 0).
Eighty percent of sewage in India is untreated and flows directly into the nation's rivers, polluting the main sources of drinking water, a study by an environment watchdog showed Tuesday.
This blog focuses on the issue of water pollution in India as it is a serious problem plaguing a great majority of its people, and its severity and scope are great causes for concern. As of 2013, 80% of sewage in India flows untreated into the countryâs rivers.ntreated sewage is a major source of water pollution in India, as well as many other countries globally, as untreated sewage can lead to surface runoff and seepage and release into water bodies. Sometimes, untreated sewage is also released directly into water bodies, hence it is a form of point source pollution.