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EWG's Tap Water Database — 2021 UPDATE

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1,2,4-Trichlorobenzene

Clark Public Utilities

1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.

MORE ABOUT THIS CONTAMINANT

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND70ND
2015ND10ND
2016ND70ND
2017ND70ND
2018ND110ND
2019ND40ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 5 ppb

The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene 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 hormone disruption.

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2014-08-2691031ND
2014-10-2720682ND
2014-10-2720681ND
2014-12-0335981ND
2014-12-0335982ND
2014-12-0335985ND
2014-12-0335983ND
2015-06-1172701ND
2016-07-12ND
2016-07-12ND
2016-08-24ND
2016-08-24ND
2016-09-06ND
2016-09-14ND
2016-09-28ND
2017-07-07ND
2017-07-07ND
2017-07-07ND
2017-07-07ND
2017-07-07ND
2017-07-27ND
2017-12-28ND
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-08-28ND
2018-08-28ND
2018-09-18ND
2018-09-18ND
2018-09-18ND
2018-11-18ND
2019-02-24ND
2019-02-24ND
2019-07-22ND
2019-09-05ND