1,2,4-Trichlorobenzene
Metropolitan Water District of So. Cal.
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 | 5 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 7 | 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 |
|---|---|---|
| 2014-10-07 | 4412-026-1000 | ND |
| 2014-10-07 | 4412-020-1120 | ND |
| 2014-10-07 | 4412-013-1020 | ND |
| 2014-10-07 | 4412-005-0840 | ND |
| 2014-10-07 | 4412-003-0819 | ND |
| 2015-01-06 | 4412-020-1055 | ND |
| 2015-01-06 | 4412-026-0820 | ND |
| 2015-01-06 | 4412-003-0810 | ND |
| 2015-01-06 | 4412-013-1015 | ND |
| 2015-01-06 | 4412-005-0845 | ND |
| 2016-04-04 | 4412-003-1015 | ND |
| 2016-04-04 | 4412-026-0920 | ND |
| 2016-04-04 | 4412-005-0730 | ND |
| 2016-04-04 | 4412-020-1030 | ND |
| 2016-04-04 | 4412-013-1020 | ND |
| 2017-07-31 | 4412-003-1000 | ND |
| 2017-07-31 | 4412-005-0905 | ND |
| 2017-07-31 | 4412-013-0900 | ND |
| 2017-08-01 | 4412-026-1110 | ND |
| 2017-08-02 | 4412-020-0835 | ND |
| 2018-10-02 | 4412-013-1010 | ND |
| 2018-10-02 | 4412-020-1020 | ND |
| 2018-10-02 | 4412-003-1046 | ND |
| 2018-10-02 | 4412-005-0742 | ND |
| 2018-10-02 | 4412-026-0950 | ND |
| 2019-01-02 | 4412-003-0910 | ND |
| 2019-01-02 | 4412-020-1040 | ND |
| 2019-01-02 | 4412-026-0737 | ND |
| 2019-01-02 | 4412-005-0715 | ND |
| 2019-01-14 | 4412-013-0825 | ND |
| 2019-10-21 | 9588-005-0745 | ND |
| 2019-10-22 | 9588-020-1315 | ND |