1,2,4-Trichlorobenzene
Claflin, City of
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2015-10-13 | 419868 | ND |
| 2015-10-13 | 419867 | ND |
| 2015-10-13 | 419866 | ND |
| 2016-02-08 | 490668 | ND |
| 2016-02-08 | 490667 | ND |
| 2016-05-10 | 544823 | ND |
| 2016-05-10 | 544822 | ND |
| 2016-08-16 | 604705 | ND |
| 2016-08-16 | 604703 | ND |
| 2017-09-25 | 847633 | ND |
| 2017-09-25 | 847634 | ND |
| 2018-02-26 | 906999 | ND |
| 2018-02-26 | 906998 | ND |
| 2018-10-21 | 1064831 | ND |
| 2018-10-21 | 1064830 | ND |
| 2018-10-21 | 1064829 | ND |
| 2019-02-25 | 1126130 | ND |
| 2019-02-25 | 1126129 | ND |
| 2019-02-25 | 1126128 | ND |
| 2019-04-15 | 1138049 | ND |
| 2019-07-16 | 1205463 | ND |
| 2019-10-15 | 1259661 | ND |