The Voice
(by Alana E. Fortna)
Contaminated water supplies are causing quite the stir and creating headlines in local newspapers across the country. The increased attention and scrutiny is due to the detection of unregulated substances that may pose a risk to human health or the environment, referred to as “emerging contaminants.” An “emerging contaminant” is a chemical or material characterized by a perceived, potential, or real threat to human health or the environment, or by a lack of a published health standard.
Emerging contaminants do not have a federal maximum contaminant level for drinking water, surface water, or groundwater under the Safe Drinking Water Act (SDWA). Maximum contaminant levels are one of the factors considered by the United States Environmental Protection Agency (EPA) when evaluating the appropriate remedial action at a contaminated groundwater site. Unless a state has promulgated a standard to address the particular emerging contaminant, water purveyors, companies performing remediation work, and environmental consultants can find themselves in a state of uncertainty regarding compliance for remediation projects.
So how does the EPA address emerging contaminants? Currently, the EPA issues non-binding health advisories that are sometimes used as default cleanup levels when there are no binding standards (i.e., maximum contaminant levels). There are problems with this approach, such as a lack of collaboration with states and municipalities when prioritizing contaminants for health advisories, a lack of communication with water purveyors, and a lack of clarification regarding the difference between a health advisory and a maximum contaminant level. In addition to health advisories, emerging contaminants are often placed on the contaminant candidate list, which is a list of unregulated contaminants that mayrequire regulation under the SDWA. However, the presence of these contaminants in the environment may already be widespread, and the promulgation process can be lengthy, as the regulators try to determine the safe level of exposure for these contaminants. …