1,2,4-Trichlorobenzene
Coal Valley
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 | 2 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-05-12 | SE40517-01_01 | ND |
| 2014-05-27 | SE41211-01_01 | ND |
| 2015-05-04 | SE50079-01_01 | ND |
| 2015-07-13 | SG50693-01_01 | ND |
| 2015-11-04 | SK50224-01_01 | ND |
| 2016-02-09 | 16B0344-01_01 | ND |
| 2016-05-18 | 16E0793-01_01 | ND |
| 2016-05-18 | 16E0793-02_01 | ND |
| 2016-07-20 | 16G0971-01_01 | ND |
| 2016-11-21 | 16K0672-01_01 | ND |
| 2017-01-03 | 17A0025-01_01 | ND |
| 2017-04-10 | 17D0302-02_01 | ND |
| 2017-04-10 | 17D0302-01_01 | ND |
| 2017-07-17 | 17G0707-01_01 | ND |
| 2017-10-02 | 17J0043-01_01 | ND |
| 2018-03-27 | 18C0598-01_03 | ND |
| 2018-04-04 | 18D0149-01_01 | ND |
| 2018-07-16 | 18G0574-01 | ND |
| 2018-10-10 | 18J0383-01_01 | ND |
| 2019-05-13 | 19E0449-01 | ND |
| 2019-10-28 | 19J0977-01 | ND |