1,2,4-Trichlorobenzene
City of Hewitt
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 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 |
|---|---|---|
| 2014-01-14 | AC38665 | ND |
| 2015-03-23 | AC85655 | ND |
| 2015-03-23 | AC85645 | ND |
| 2015-03-23 | AC85649 | ND |
| 2016-01-20 | AD19002 | ND |
| 2016-01-20 | AD19012 | ND |
| 2016-04-06 | AD32129 | ND |
| 2017-04-03 | AD78087 | ND |
| 2017-10-09 | AD99814 | ND |
| 2017-10-31 | AE03236 | ND |
| 2018-02-07 | AE12765 | ND |
| 2018-04-19 | AE23265 | ND |
| 2018-04-19 | AE23263 | ND |
| 2019-02-12 | AE54094 | ND |
| 2019-02-12 | AE54098 | ND |
| 2019-02-12 | AE54084 | ND |