Study of Houston's tap water finds 10 cancer-causing contaminants, including arsenic

You may want to think twice that midnight run to get a drink of water from the sink.

Environmental Working Group, a non-profit research group, recently examined data on tap water in Houston and throughout the U.S.

Their findings, published in an online database, found some unsettling news about Houston's H2O.

A total of 10 cancer-causing contaminants, including arsenic and chloroform, were found to be above national and state averages in Houston's tap water. Researchers also found an additional 30 contaminants that matched or were close to national and state averages, including aluminum, cyanide and fluoride.

The full list can be viewed here.

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Cancer-causing habits and things

A study of Houston's tap water has found it contains 10 cancer-causing contaminates that are above national and state averages.

Click through to see things that could give you cancer, according to the World Health Organization. less Cancer-causing habits and things

A study of Houston's tap water has found it contains 10 cancer-causing contaminates that are above national and state averages.

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"Americans deserve the fullest picture possible of what's in their tap water," said EWG President Ken Cook in a prepared statement. "But they won't get that information from the government or, in many cases, from their utilities. The only place they'll find that is EWG's drinking water report."

In order to build the database, researchers gathered data on almost 50,000 public water systems throughout the U.S.

In Houston, researchers used data from the Texas Commission on Environmental Quality as well as the U.S. EPA Enforcement and Compliance History database. The study used water tap information from 2010 to 2015.

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"Just because your tap water gets a passing grade from the government doesn't always mean it's safe," Cook said. "It's time to stop basing environmental regulations on political or economic compromises, and instead listen to what scientists say about the long-term effects of toxic chemicals and empower Americans to protect themselves from pollutants even as they demand the protective action they deserve from government."

Click through to see things that could give you cancer, according to the World Health Organization.