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EWG's Tap Water Database — 2021 UPDATE

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1,2,4-Trichlorobenzene

Placer County Water Agency - Foothill

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND20ND
2016ND40ND
2017N/A00N/A
2018ND30ND
2019ND30ND

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
2014-08-203334-002-1010ND
2014-08-203334-007-1200ND
2015-08-113334-002-1000ND
2015-08-113334-007-1305ND
2016-03-302113-014-1440ND
2016-08-032113-014-1045ND
2016-08-172113-002-1215ND
2016-08-172113-007-0945ND
2018-08-143334-002-1120ND
2018-08-143334-007-1310ND
2018-08-221233-014-0930ND
2019-08-273334-002-0000ND
2019-09-093334-007-1330ND
2019-09-123334-014-1150ND