1,2,4-Trichlorobenzene
Widefield WSD
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 11 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 6 | 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 | Result |
|---|---|
| 2014-02-12 | ND |
| 2014-03-12 | ND |
| 2014-03-19 | ND |
| 2014-06-16 | ND |
| 2014-09-16 | ND |
| 2014-12-04 | ND |
| 2015-01-27 | ND |
| 2015-06-08 | ND |
| 2015-06-08 | ND |
| 2015-06-09 | ND |
| 2015-09-21 | ND |
| 2015-09-21 | ND |
| 2015-09-22 | ND |
| 2015-12-07 | ND |
| 2016-03-14 | ND |
| 2016-05-02 | ND |
| 2016-05-02 | ND |
| 2016-05-02 | ND |
| 2016-05-03 | ND |
| 2016-05-03 | ND |
| 2016-08-08 | ND |
| 2016-08-23 | ND |
| 2016-08-23 | ND |
| 2016-09-06 | ND |
| 2016-12-05 | ND |
| 2017-01-18 | ND |
| 2017-05-24 | ND |
| 2017-06-07 | ND |
| 2017-06-07 | ND |
| 2017-06-07 | ND |
| 2017-08-30 | ND |
| 2018-08-21 | ND |
| 2018-08-21 | ND |
| 2018-11-26 | ND |
| 2018-11-27 | ND |
| 2019-02-26 | ND |
| 2019-02-26 | ND |
| 2019-02-26 | ND |
| 2019-05-06 | ND |
| 2019-05-28 | ND |
| 2019-09-09 | ND |