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EWG's Tap Water Database — 2019 UPDATE

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Carbon tetrachloride

California Water Service Co-leona Valley

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.

 

43

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
2013ND90ND
2014ND100ND
2015ND60ND
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
2012-01-245701-008-1250ND
2012-02-285701-006-1415ND
2012-02-285701-001-1410ND
2012-05-235701-006-1230ND
2012-05-235701-001-1215ND
2012-08-155701-006-1144ND
2012-08-155701-001-1136ND
2012-08-155701-008-1128ND
2012-11-195701-006-1210ND
2012-11-195701-001-1217ND
2013-01-225701-008-1135ND
2013-02-125701-006-1115ND
2013-02-125701-001-1100ND
2013-05-215701-001-1447ND
2013-08-265701-008-1202ND
2013-08-265701-006-1213ND
2013-08-265701-001-1220ND
2013-11-195701-006-1056ND
2013-11-195701-001-1045ND
2014-01-215701-008-1129ND
2014-02-185701-001-1113ND
2014-02-185701-006-1123ND
2014-05-275701-001-1212ND
2014-05-275701-006-1215ND
2014-08-255701-006-1055ND
2014-08-255701-008-1025ND
2014-08-255701-001-1040ND
2014-11-185701-001-1124ND
2014-11-185701-006-1130ND
2015-01-205701-008-1108ND
2015-02-175701-001-1116ND
2015-02-175701-006-1128ND
2015-05-195701-006-1021ND
2015-05-195701-001-1028ND
2015-08-185701-008-1055ND
2016-01-195701-008-1500ND
2016-05-245701-006-1238ND
2016-05-245701-001-1244ND
2016-08-039590-008-1045ND
2017-01-245701-008-1506ND
2017-05-025701-006-1241ND
2017-05-025701-001-1245ND
2017-08-225701-008-1525ND