Question

The maximum permissible limit of total dissolved solids (TDS) in drinking water in the absence of an alternate source as per IS 10500-2012 is:
1. 100 mg/l
2. 200 mg/l
3. 500 mg/l
4. 2000 mg/l

Answer 1

Correct Answer - Option 4 : 2000 mg/l

Explanation:

• The desirable drinking water standard for total dissolved solids is 500 mg/l.
• If there are no alternate sources of water available then the permissible limit is increased to 2000 mg/l.
• Dissolved solids are organic/inorganic compounds such as salts, and heavy metals etc.
• They cause health hazards like cancer due to the presence of heavy metals like arsenic etc.