1,2,4-Trichlorobenzene
Wilk-amite W/a #1-south
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 | 3 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 4 | 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 |
|---|---|---|
| 2014-01-21 | 140122-014VO | ND |
| 2014-04-17 | 140418-005VO | ND |
| 2014-07-24 | 140725-001VO | ND |
| 2015-07-08 | 150709-001VO | ND |
| 2016-02-23 | 160224-006VO | ND |
| 2016-04-12 | 160413-007VO | ND |
| 2016-11-03 | 161104-001VO | ND |
| 2017-03-22 | 170323-001VO | ND |
| 2017-05-16 | 170517-011VO | ND |
| 2017-08-21 | 170822-014VO | ND |
| 2017-11-16 | 171120-001VO | ND |
| 2018-11-13 | 181114-001VO | ND |
| 2019-06-26 | 190627-001VO | ND |