1,2,4-Trichlorobenzene
Waialee-sunset Beach
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 | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2014-02-19 | 201402210361 | ND |
| 2014-02-20 | 201402220088 | ND |
| 2014-07-21 | 201407230664 | ND |
| 2014-07-21 | 201407230666 | ND |
| 2015-01-29 | 201501300117 | ND |
| 2015-04-28 | 201504300075 | ND |
| 2016-01-13 | ND | |
| 2016-07-05 | ND | |
| 2017-01-04 | ND | |
| 2017-02-23 | ND | |
| 2017-10-10 | ND | |
| 2017-10-31 | ND | |
| 2018-01-09 | 201712280239 | ND |
| 2018-04-25 | 201804300496 | ND |
| 2018-08-13 | 201808160452 | ND |
| 2019-02-19 | 201902210382 | ND |