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EWG's Tap Water Database — 2019 UPDATE

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Carbon tetrachloride

Shawano Co. Utility

Carbon tetrachloride, a volatile carcinogenic solvent, has been used in industrial chemical production and as a dry cleaning ingredient. Read More.

Carbon tetrachloride is no longer permitted in products intended for home use in the U.S. In the past, it was widely used as a dry cleaning ingredient, fire extinguishing chemical, pesticide and chemical intermediate for manufacturing refrigerants. Carbon tetrachloride does not break down easily and can remain in groundwater for years. In addition to increasing cancer risk, carbon tetrachloride harms the liver and causes central nervous system depression, irregular heart rate, and kidney damage. Maternal exposure to carbon tetrachloride in drinking water has been associated with a risk of birth defects.

Click here to read more about carcinogenic VOCs.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for carbon tetrachloride was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for carbon tetrachloride, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to carbon tetrachloride exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-03-19654762ND
2012-06-18668386ND
2012-07-23674188ND
2012-11-06692768ND
2013-03-19710364ND
2013-05-21720578ND
2013-08-06735643ND
2013-10-22754118ND
2014-03-19775750ND
2014-04-15780543ND
2014-08-19811520ND
2014-11-18832018ND
2015-03-17848835ND
2015-06-15865705ND
2015-09-08881303ND
2015-11-17894386ND
2016-02-16905511ND
2016-04-18916035ND
2016-08-09938143ND
2016-10-25955476ND
2017-03-06976137ND
2017-05-30994131ND
2017-09-111017363ND
2017-10-231025634ND