MTBE: From Clean Air to Toxic Water
What is MTBE?
MTBE(methyl tertiary-butyl ether) is a chemical compound that is produced in large quantities as a fuel additive to help gasoline burn more effectively to reduce air pollution. So what’s it doing in our drinking water?
MTBE has been used in U.S. gasoline at low levels since 1979 to replace lead as an octane enhancer. Since 1992, MTBE has been used at higher concentrations in some gasoline to fulfill the oxygenate requirements set by Congress in the 1990 Clean Air Act Amendments. MTBE was used across the US up until the last decade as a gasoline additive to make the fuel burn more thoroughly and reduce air pollution. Anytime this toxic chemical leaks or spills on to the ground, the toxins seep into the ground and contaminate natural ground water sources.
MTBE is now a commonly found contaminant in drinking water across the United States. The EPA reports a growing number of studies have detected MTBE in ground water throughout the country; in some instances these contaminated waters are sources of drinking water.The MTBE gasoline additive is now banned in many states due to the elevated risk of brain tumors, liver cancer, blood cancer, and kidney cancer when inhaled or ingested from tap water.
Who is affected?
Almost everyone in the United States breathes in or drinks some MTBE. However, some states have seen dangerously elevated levels of MTBE contamination and have banned its use. New York and California banned MTBE use in 2004, and twenty-three other states followed suit by signing legislation banning MTBE by 2005. The current court battle in New Hampshire alleges pollution of 40,000 wells with 5,590 of them reaching levels that make the water unfit for human consumption.
What you can do to protect yourself from MTBE:
If you are concerned about MTBE in your water make sure you are using a water filter that removes this harmful toxin. Aquasana water filters are certified to reduce MTBE in tap and well water. For more information on the specific impact of MTBE on your local water source contact your local EPA drinking water office for more information.