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EWG's Tap Water Database — 2019 UPDATE

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1,2,4-Trichlorobenzene

La Habra Heights County Water District

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

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND30ND
2014ND30ND
2015ND40ND
2016ND40ND
2017ND40ND

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
2012-03-292706-009-0855ND
2012-04-172706-010-1335ND
2012-08-132706-005-1045ND
2013-01-222706-009-1115ND
2013-04-252706-010-1055ND
2013-07-162706-005-1340ND
2014-01-089588-009-0929ND
2014-04-119588-010-0930ND
2014-07-229588-005-0950ND
2015-03-049588-009-0928ND
2015-04-109588-010-0920ND
2015-07-289588-005-0947ND
2015-09-169588-006-1010ND
2016-03-219588-009-0940ND
2016-07-139588-010-0840ND
2016-07-139588-006-0857ND
2016-07-139588-005-0907ND
2017-01-179588-009-0925ND
2017-07-199588-010-0900ND
2017-07-199588-006-0934ND
2017-07-199588-005-0915ND