Question

2.1 Acceptable limit of arsenic in drinking water
is
as defined by WHO and
Itai Itai disease is caused
by
poisoning​

Answer 1

The current recommended limit of arsenic in drinking-water is 10 μg/L, although this guideline value is designated as provisional because of practical difficulties in removing arsenic from drinking water.

Itai-Itai disease was caused by cadmium poisoning due to mining in Toyama Prefecture. Regular mining for silver started in 1589, and soon thereafter, mining for lead, copper, and zinc began. The earliest records of mining for gold in the area date back to 1710.