Description:
The World Health Organization (WHO) sets global "Guidelines for Drinking-water Quality" (GDWQ) to help countries create national standards, focusing on health risks from chemicals (like arsenic, lead, fluoride) and microbes, alongside aesthetic factors (taste, color). These guidelines provide evidence-based benchmarks (e.g., 0.01 mg/L for arsenic, 1.5 mg/L for fluoride) for safe drinking water, though actual legal limits vary by country, often incorporating WHO recommendations but also national priorities.
