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EWG's Tap Water Database — 2019 UPDATE

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Carbon tetrachloride

City of Denison

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND20ND
2014ND20ND
2015ND20ND
2016ND20ND
20170.555 ppb21ND - 1.11 ppb

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
2012-02-011202040006ND
2013-03-061303263005ND
2013-06-12Q1302205017ND
2014-02-25Q1406059012ND
2014-02-25Q1406059008ND
2015-03-03Q1507894007ND
2015-06-15Q1522052001ND
2016-02-16Q1606768003ND
2016-02-16Q1606768002ND
2017-02-07Q1705466002ND
2017-08-08Q17337900021.11 ppb