1,2,4-Trichlorobenzene
Topaz Lake Water Company Inc.
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 | 1 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-04-17 | A4D1784-01 | ND |
| 2016-04-13 | A6D1566-01 | ND |
| 2017-04-25 | A7D2594-01 | ND |
| 2017-07-25 | A7G2768-01 | ND |
| 2017-11-13 | A7K1593-01 | ND |
| 2018-03-19 | A8C3101-01 | ND |
| 2018-05-15 | 18050824-01A | ND |
| 2018-07-20 | A8G3158-01 | ND |
| 2018-11-13 | A8K1915-01 | ND |
| 2019-01-28 | A9A3651-01 | ND |
| 2019-05-17 | A9E2697-01 | ND |
| 2019-07-18 | A9G3232-01 | ND |
| 2019-10-31 | A9K0025-01 | ND |