1,2,4-Trichlorobenzene
Bay Laurel S/d
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-01-28 | C316002-01 | ND |
| 2014-04-29 | C402965-01 | ND |
| 2014-08-01 | C407771-01 | ND |
| 2014-10-14 | C411974-01 | ND |
| 2015-01-20 | ND | |
| 2015-04-21 | ND | |
| 2015-07-21 | ND | |
| 2015-10-27 | ND | |
| 2016-01-25 | C515765-01 | ND |
| 2016-05-02 | CZ03111-01 | ND |
| 2016-08-23 | CZ08289-01 | ND |
| 2016-11-10 | CZ13724-01 | ND |
| 2017-02-28 | CZ18645-01 | ND |
| 2017-05-09 | CA02800-01 | ND |
| 2017-07-11 | CA07658-01 | ND |
| 2017-11-08 | CA13189-01 | ND |
| 2018-10-12 | CB14296-01 | ND |
| 2019-11-19 | CC15766-01 | ND |