1,2,4-Trichlorobenzene
Woodward
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 | 7 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 2 | 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 |
|---|---|---|
| 2014-02-03 | 4B04005-01 | ND |
| 2014-04-21 | 4D21056-01 | ND |
| 2014-05-19 | 4E19039-01 | ND |
| 2014-08-04 | 4H04065-01 | ND |
| 2014-08-18 | 4H18051-01 | ND |
| 2014-09-18 | 4I19019-01 | ND |
| 2014-10-20 | 4J20046-01 | ND |
| 2015-01-26 | 5A26031-01 | ND |
| 2015-04-20 | 5D20026-01 | ND |
| 2015-08-03 | 5H03084-01 | ND |
| 2015-10-19 | 5J19021-01 | ND |
| 2016-03-31 | 6D04068-01 | ND |
| 2016-04-18 | 6D18049-01 | ND |
| 2016-06-06 | 6F06053-01 | ND |
| 2016-08-15 | 6H16112-01 | ND |
| 2016-11-21 | 6K21032-01 | ND |
| 2017-10-16 | 7J16069-03 | ND |
| 2017-10-16 | 7J16069-02 | ND |
| 2018-02-26 | AB26071-01 | ND |
| 2019-06-17 | BF17069-01 | ND |