1,2,4-Trichlorobenzene
Stonetown Clearview Mhc
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 | 5 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 5 | 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 |
|---|---|---|
| 2014-01-12 | 038681.001 | ND |
| 2014-04-13 | 042200.001 | ND |
| 2014-07-20 | 045604.001 | ND |
| 2014-10-19 | 049087.001 | ND |
| 2015-01-19 | 052205.001 | ND |
| 2015-05-25 | 054852.001 | ND |
| 2015-08-16 | 059184.001 | ND |
| 2015-09-13 | 059184.002 | ND |
| 2015-10-20 | 063833.001 | ND |
| 2016-04-17 | SDWA-1013236-00 | ND |
| 2016-10-10 | SDWA-1072323-00 | ND |
| 2016-12-11 | SDWA-1106709-00 | ND |
| 2017-03-28 | SDWA-1136333-00 | ND |
| 2017-06-12 | SDWA-1150885-03 | ND |
| 2017-08-24 | SDWA-1192390-00 | ND |
| 2017-08-24 | SDWA-1192389-00 | ND |
| 2017-12-07 | SDWA-1214323-03 | ND |
| 2018-05-30 | SDWA-1237660-00 | ND |
| 2019-02-19 | SDWA-1350493-00 | ND |