1,2,4-Trichlorobenzene
Golden State Water Company (GSWC) -Willowbrook
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
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 |
|---|---|---|
| 2014-02-05 | 2706-001-1130 | ND |
| 2014-02-05 | 2706-003-1145 | ND |
| 2015-02-02 | 2706-001-0943 | ND |
| 2015-02-02 | 2706-003-0915 | ND |
| 2016-02-02 | 2706-001-0905 | ND |
| 2016-02-02 | 2706-003-0906 | ND |
| 2017-02-08 | 9590-001-1345 | ND |
| 2017-02-08 | 9590-003-1351 | ND |
| 2018-02-06 | 9590-001-1220 | ND |
| 2018-02-06 | 9590-003-1230 | ND |
| 2019-02-12 | 9590-001-1000 | ND |
| 2019-02-12 | 9590-003-1002 | ND |