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EWG's Tap Water Database — 2021 UPDATE

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Hexachlorobenzene (HCB)

Somervell County Water District - Wheele

Hexachlorobenzene is a cancer-causing, neurotoxic and hormone-disrupting chemical used as a pesticide until 1984. It is still found in landfills and hazardous waste sites, and can be detected in people.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND50ND
2016ND10ND
2017ND10ND
2018ND10ND
2019ND10ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.03 ppb

The EWG Health Guideline of 0.03 ppb for hexachlorobenzene 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) 1 ppb

The legal limit for hexachlorobenzene, established in 1992, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to hexachlorobenzene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2014-11-04Q1454693003ND
2015-03-02Q1507737003ND
2015-03-19Q1510437001ND
2015-06-16Q1522312002ND
2015-09-17Q1536368001ND
2015-12-14Q1549697002ND
2016-06-14Q1623961006ND
2017-08-24Q1738198001ND
2018-04-26Q1817130001ND
2019-02-13Q1906633003ND