1 An SDWR concentration of a constituent is a non-enforceable Federal guideline regarding cosmetic effects (such as tooth or skin discoloration) or esthetic effects (such as taste, odor, or color) in drinking water.
2 An MCL is the largest concentration of a contaminant that is allowed in drinking water and is an enforceable Federal standard.
3 A lifetime HA is a non-enforceable estimate of an acceptable concentration of a chemical substance in drinking water for a lifetime of exposure.