Know Your Environment. Protect Your Health.

1,2,4-Trichlorobenzene

Geary

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

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND30ND
2020ND10ND
2021N/A00N/A
2022N/A00N/A
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
2018-01-30SDWA-1228010-00ND
2018-04-04SDWA-1251685-00ND
2018-07-10SDWA-1280192-00ND
2018-10-19SDWA-1313571-03ND
2019-02-06SDWA-1338860-00ND
2019-04-02SDWA-1361027-00ND
2019-08-05SDWA-1392180-00ND
2020-02-11SDWA-1456751-00ND
2023-02-01SDWA-1766568-00ND
2023-02-01SDWA-1766575-00ND