Know Your Environment. Protect Your Health.

Carbon tetrachloride

City of Obrien

NOTE: City of Obrien purchases water from North Central Texas Municipal Water Authority which is required to test for carbon tetrachloride. Sample information shown below was taken by North Central Texas Municipal Water Authority.

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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

NOTE: City of Obrien purchases water from North Central Texas Municipal Water Authority which is required to test for carbon tetrachloride. Sample information shown below was taken by North Central Texas Municipal Water Authority.

Date Lab ID Result
2018-02-13Q1806366023ND
2018-02-13Q1806366017ND
2018-05-15Q1819778005ND
2018-09-10Q1835655007ND
2019-09-10Q1963432002ND
2019-09-10Q1963432004ND
2019-09-10Q1963432006ND
2019-09-10Q1963432008ND
2020-05-26Q2020617010ND
2020-05-26Q2020617012ND
2020-05-26Q2020617014ND
2020-09-15Q2036511001ND
2021-03-01Q2105128004ND
2021-03-01Q2105128002ND
2021-05-18Q2112967013ND
2021-08-24Q2122978005ND
2021-08-24Q2122978013ND
2021-12-09Q2134685004ND
2022-03-02Q2207242006ND
2022-03-02Q2207242008ND
2022-03-02Q2207242010ND
2022-09-07Q2226614008ND
2023-03-08Q2309188005ND
2023-05-16Q2318416003ND
2023-05-16Q2318416005ND
2023-09-05Q2338005004ND