Best Drinking Water Standards in the World

Some of the best drinking water standards in the world are the 'WHO Guidelines for drinking-water quality', 'EPA Drinking Water Standards', British Water Supply (Water Quality) Regulations 2018 (SI 2018/647), Indian Drinking Water Standards BIS-10500, etc. These Global Drinking Water Standards are set by Government Organisations. This is the .pdf link to the complete text of the latest BIS-10500 Indian Drinking water Standard. We also have below a table of BIS-10500, the Indian Water Quality Standards.

The World Health Organisation's - WHO Guidelines for drinking-water quality has a wealth of information and those interested should visit their website. WHO's Guidelines for Drinking-water Quality was set up in Geneva in 1993. These standards are the international reference point for for drinking water standards.

For India these standards are set by the Bureau of Indian Standards - BIS, the erstwhile Indian Standards Institute – ISI. The relevant BIS standard is BIS: 10500 available from the BIS site www.bis.gov.in

For those of you interested in seeing the American Water Standards set by the internationally famous Environmental Protection Agency - the EPA Water Quality Standards, please visit the EPA site

Here below please find a copy of the main parameters set by the Indian Drinking Water Standards authority known as the BUREAU OF INDIAN STANDARDS.

The table here is sometimes modified by the Government of India. So for the latest Indian Standards for drinking water it is recommended to visit their website

Please note that all figures in the table below are in ppm or mg/L