1,2,4-Trichlorobenzene
Hydro Public Works Authority
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 | 1 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-23 | 039216.001 | ND |
| 2015-01-20 | 052796.001 | ND |
| 2015-09-18 | 063290.007 | ND |
| 2015-09-18 | 063290.006 | ND |
| 2015-09-18 | 063290.005 | ND |
| 2015-09-18 | 063290.004 | ND |
| 2015-09-18 | 063290.003 | ND |
| 2015-09-18 | 063290.002 | ND |
| 2015-09-18 | 063290.001 | ND |
| 2016-07-08 | SDWA-1044817-00 | ND |
| 2016-07-08 | SDWA-1044835-00 | ND |
| 2016-07-08 | SDWA-1044823-00 | ND |
| 2016-07-08 | SDWA-1044811-00 | ND |
| 2016-07-08 | SDWA-1044798-00 | ND |
| 2017-05-08 | SDWA-1144632-00 | ND |
| 2017-05-08 | SDWA-1144624-00 | ND |
| 2017-05-08 | SDWA-1144615-03 | ND |
| 2017-06-29 | SDWA-1168943-00 | ND |
| 2017-06-29 | SDWA-1168942-00 | ND |
| 2018-02-09 | SDWA-1237518-00 | ND |
| 2018-02-09 | SDWA-1237541-00 | ND |
| 2018-02-09 | SDWA-1237535-00 | ND |
| 2018-02-09 | SDWA-1237529-00 | ND |
| 2018-02-09 | SDWA-1237523-00 | ND |