The Bureau of Indian Standards (BIS) has made several amendments to the IS 10500:2012 drinking water specification standard, including:

The Bureau of Indian Standards (BIS) has made several amendments to the IS 10500:2012 drinking water specification standard, including:

Amendment 1, June 2015

Increased the maximum fluoride limit from 0.3 to 1.0 milligrams per liter, and removed the relaxation limit for arsenic 

Amendment 2, 2020

Focused on microbiological requirements, including stricter limits for coliform bacteria and the introduction of E. coli 

Amendment 3, February 2021

Increased the maximum chloride limit from 0.5 to 1.0 milligrams per liter, added uranium with a maximum limit of 0.03 milligrams per liter, and revised clauses around microbial testing 

Amendment 4, November 2021

Substituted the reference "IS 3025 (Part 65)" with "IS 3025 (Part 65) or IS 14194 (Part 3)" in Table 3, and inserted a new reference in Annex A 

These amendments reflect advancements in water quality management and international best practices, with the aim of improving the safety and purity of drinking water.