1,2,4-Trichlorobenzene
Newhall Cwd-castaic
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 | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-02-13 | 9590-008-0925 | ND |
| 2014-02-13 | 9590-002-0918 | ND |
| 2014-02-13 | 9590-001-0904 | ND |
| 2015-02-19 | 9590-001-1020 | ND |
| 2015-02-19 | 9590-002-1110 | ND |
| 2015-02-19 | 9590-008-1050 | ND |
| 2016-02-18 | 9590-001-1120 | ND |
| 2016-02-18 | 9590-008-1040 | ND |
| 2016-02-18 | 9590-002-1030 | ND |
| 2017-02-16 | 9590-002-0919 | ND |
| 2017-02-16 | 9590-008-0931 | ND |
| 2017-11-02 | 9590-001-1040 | ND |
| 2018-04-05 | 2104-002-0935 | ND |
| 2018-04-05 | 2104-008-0956 | ND |
| 2018-04-05 | 2104-001-0905 | ND |
| 2019-04-18 | 9590-002-0920 | ND |
| 2019-04-18 | 9590-008-0910 | ND |
| 2019-04-18 | 9590-001-0850 | ND |