Know Your Environment. Protect Your Health.

1,2,4-Trichlorobenzene

Encinal Water Supply Corporation

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

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND60ND
2021ND30ND
2022ND30ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-07-19AE33973ND
2018-07-19AE33965ND
2019-09-26AE84864ND
2019-12-11AE92154ND
2020-03-24AF04315ND
2020-03-24AF04317ND
2020-03-24AF04319ND
2020-06-08AF14872ND
2020-07-20AF19932ND
2020-12-10AF37297ND
2021-08-04AF64835ND
2021-08-04AF64837ND
2021-12-22AF79284ND
2022-09-29AG15510ND
2022-09-29AG15512ND
2022-09-29AG15514ND
2023-09-14AG56310ND
2023-09-14AG56314ND
2023-09-14AG56318ND