1,2,4-Trichlorobenzene
Ventura County Waterworks District No. 19 - Somis
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 | 1 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-09-03 | 5867-007-1004 | ND |
| 2014-09-09 | 5867-002-1241 | ND |
| 2015-07-16 | 5867-001-0820 | ND |
| 2017-08-01 | 5867-001-1419 | ND |
| 2017-08-01 | 5867-002-1343 | ND |
| 2017-08-01 | 5867-007-0815 | ND |
| 2018-08-01 | 5867-002-1404 | ND |
| 2018-08-01 | 5867-007-1337 | ND |
| 2018-08-14 | 5867-001-1147 | ND |
| 2019-08-07 | 5867-001-1409 | ND |
| 2019-08-07 | 5867-002-1345 | ND |
| 2019-08-07 | 5867-007-1317 | ND |