1,2,4-Trichlorobenzene
Bullock Pen Water District
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 | 1 | 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 |
|---|---|---|
| 2014-03-17 | 4032041-01 | ND |
| 2014-04-21 | 4042445-01 | ND |
| 2014-07-21 | 4071373-01 | ND |
| 2014-10-20 | 4102341-01 | ND |
| 2015-02-23 | 5022560-01 | ND |
| 2015-04-20 | 5042963-01 | ND |
| 2015-07-20 | 5073210-01 | ND |
| 2015-10-19 | 5102696-01 | ND |
| 2016-01-18 | 6012574-01 | ND |
| 2016-04-18 | 6042551-01 | ND |
| 2016-07-18 | 6072775-01 | ND |
| 2016-12-19 | 6122584-01 | ND |
| 2017-10-16 | 7100166-01 | ND |
| 2018-10-15 | 8100228-01 | ND |
| 2019-10-21 | 9103477-01 | ND |