Is Trichloroethylene (TCE) in our Drinking Water?
Recent reports of Trichloroethylene in public water systems have been surfacing and gaining media attention. The Environmental Working Group, (EWG) a research non-profit agency, released an analysis of tests from public utilities nationwide. The analysis stated that approximately 14 million people are impacted by the carcinogenic pollutant, also known as TCE. They also conclude that a person drinking water at or below the updated guidance value, whether exposed briefly, occasionally, or daily for a lifetime would have little or no risk of health effects. Moreover, the trend for TCE-use has been experiencing a consistent decline in usage and the exposure appears to be declining in the general population. Consumers should research the consumer confidence report for their specific water agency to obtain accurate information on their water quality and not rely solely on the information provided on the analysis provided by the EWC.
What is Trichloroethylene?
According to the National Institute of Environmental Health Sciences, Trichloroethylene is a colorless volatile liquid that is produced in large volumes for commercial use. It is used to make other chemicals and as a solvent that is found in processes from dry cleaning, auto maintenance, aerosol cleaning products, and a variety of other commercial industries. The Institute goes on to explain that TCE can be released into the water, air, and soil in the area where it is handled and stored. TCE can become problematic if people experience chronic exposure or consumption since it has been recently categorized as a carcinogenic. According to the Safe Drinking Water Act, the Environmental Protection Agency (EPA) is responsible for determining what level of contaminants, such as Trichloroethylene, in drinking water is safe for human consumption based on extensive testing, monitoring and research. The EPA creates enforceable drinking water standards for maximum contaminant levels (MCL). The MCL is the maximum allowable contaminant concentration, which a public water system can deliver to a customer. The current maximum contaminant level (MCL) for Trichloroethylene is 5µg/L (5 ppb).
What are public health goals?
The California Office of Environmental Health Hazard Assessment, sets public health goals. These goals are based on concentrations that pose no significant health risks if consumed for an entire lifetime. These public health goals are utilized by public water agencies to provide customers with information about drinking water contaminants in their annual consumer confidence report. Public health goals are not regulatory standards, nor are they intended to be. They are a guideline for the State Water Resources Control Board when determining the appropriate MCL for a contaminant. To find out more information from your specific water agency on levels of TCE, visit their website and evaluate the consumer confidence report, also known as water quality report.
Where to find additional information on Trichloroethylene:
Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking Water Hotline at 1-800-426-4791 or visit the EPA’s web site at www.epa.gov. Trace chemicals are measured in parts per million (ppm), which is the same as milligrams per liter (mg/L). Some constituents are measured in parts per billion (ppb). Some people may be more vulnerable to contaminants in drinking water than the general population. Those who may be particularly at risk include cancer patients, organ transplant recipients, people with HIV-AIDS or other immune system disorders, as well as some elderly individuals and infants. These people should seek advice about drinking water from their health care providers.