1,2,4-Trichlorobenzene
West Gregg Special Utility District
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
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 |
|---|---|---|
| 2018-09-13 | Q1836486004 | ND |
| 2018-09-13 | Q1836486002 | ND |
| 2018-12-05 | Q1849734003 | ND |
| 2019-02-14 | Q1906942006 | ND |
| 2019-02-14 | Q1906942010 | ND |
| 2019-03-28 | Q1912650001 | ND |
| 2019-03-28 | Q1912650003 | ND |
| 2020-01-09 | Q2000956014 | ND |
| 2020-01-09 | Q2000956016 | ND |
| 2020-01-09 | Q2000956018 | ND |
| 2021-06-15 | Q2115566006 | ND |
| 2021-06-15 | Q2115566008 | ND |
| 2021-06-15 | Q2115566004 | ND |
| 2022-03-14 | Q2208516003 | ND |
| 2022-08-17 | Q2224332010 | ND |
| 2022-08-17 | Q2224332012 | ND |
| 2022-08-17 | Q2224332014 | ND |
| 2022-12-08 | Q2237012003 | ND |
| 2023-03-07 | Q2308919006 | ND |
| 2023-03-07 | Q2308919008 | ND |
| 2023-03-07 | Q2308919010 | ND |
| 2023-07-19 | Q2328453002 | ND |