1,2,4-Trichlorobenzene
South Mesa Water Company
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 8 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 8 | 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 |
|---|---|---|
| 2016-08-02 | 3761-003-0750 | ND |
| 2016-08-02 | 3761-004-0810 | ND |
| 2016-08-02 | 3761-006-0830 | ND |
| 2016-08-02 | 3761-008-0905 | ND |
| 2016-08-02 | 3761-009-0920 | ND |
| 2016-08-02 | 3761-010-0945 | ND |
| 2016-08-02 | 3761-013-0845 | ND |
| 2016-08-02 | 3761-022-1005 | ND |
| 2019-08-12 | 3761-003-0930 | ND |
| 2019-08-12 | 3761-004-0945 | ND |
| 2019-08-12 | 3761-006-1000 | ND |
| 2019-08-12 | 3761-008-1020 | ND |
| 2019-08-12 | 3761-009-1030 | ND |
| 2019-08-12 | 3761-013-1015 | ND |
| 2019-08-12 | 3761-022-1110 | ND |
| 2019-09-30 | 3761-010-1050 | ND |