Status of drinking water regulations for the 195 countries in this study.

For each country, information, when available, is listed for the number of inorganic chemicals regulated, the of inorganic chemical regulations exceeding World Health Organization (WHO) guideline values (GVs) [18], the year of publication of the regulations, the population in 2020 [25], the gross domestic product (GDP)/capita in United States dollars (USD) [26], the World Bank (WB) income class [108], regulatory links to other organizations or countries, the type of governmental body that released the regulation, and the type of evidence that we found for the regulation.