*Maximum Contaminant Level (MCL) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to MCLGs as
feasible using the best available treatment technology and taking cost into consideration. MCLs are enforceable standards.
**Maximum Contaminant Level Goal (MCLG)
- The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety and are non-enforceable public health
WHO† - World Health Organization