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EWG's Tap Water Database — 2019 UPDATE

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Hexachlorobenzene (HCB)

Rocky Branch Water System

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND80ND
2015N/A00N/A
2016N/A00N/A
2017ND80ND

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
2014-02-17AD89245ND
2014-02-17AD89245ND
2014-02-17AD89244ND
2014-02-17AD89244ND
2014-07-15AD93577ND
2014-07-15AD93578ND
2014-07-15AD93578ND
2014-07-15AD93577ND
2017-03-1435301204004ND
2017-03-1435301204003ND
2017-03-1435301204003ND
2017-03-1435301204004ND
2017-10-0435340397002ND
2017-10-0435340397001ND
2017-10-0435340397002ND
2017-10-0435340397001ND