Know Your Environment. Protect Your Health.

1,2,4-Trichlorobenzene

Westbound Water Supply Corporation Cisco Source

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-11-28Q1848312002ND
2018-11-28Q1848312004ND
2019-12-17Q1980357004ND
2019-12-17Q1980357006ND
2020-11-09Q2043631003ND
2020-11-09Q2043631009ND
2021-02-09Q2103863001ND
2021-02-09Q2103863003ND
2022-02-16Q2205765002ND
2022-02-16Q2205765004ND
2023-02-07Q2304671006ND
2023-07-12Q2327347004ND