A list of current national drinking water standards in milligrams/liter (mg/L) for inorganic contaminants that do not have 2022 World Health Organization (WHO) guideline values (GVs), health-based values (HBVs) or health-based reference values (RVs) [18].

Minima and maxima are listed twice, first with all values as written in sources and then with potential typographical errors removed. Country categories are compared by raw count of countries and then by percentage of world population within each category. Income differences between categories are compared using population-weighted gross domestic projects (P-W GDP)/capita within each category, shown in United States dollars (USD).