1,2,4-Trichlorobenzene
City of Richwood
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 | 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 |
|---|---|---|
| 2014-04-17 | AC51086 | ND |
| 2014-04-17 | AC51088 | ND |
| 2014-04-17 | AC51096 | ND |
| 2015-01-27 | AC77951 | ND |
| 2015-01-27 | AC77961 | ND |
| 2015-01-27 | AC77955 | ND |
| 2016-01-13 | AD17923 | ND |
| 2016-01-13 | AD17921 | ND |
| 2016-01-13 | AD17895 | ND |
| 2017-01-05 | AD63251 | ND |
| 2017-01-05 | AD63229 | ND |
| 2017-01-05 | AD63237 | ND |
| 2018-02-07 | AE13021 | ND |
| 2018-04-05 | AE21468 | ND |
| 2018-04-05 | AE21466 | ND |
| 2019-01-09 | AE49225 | ND |
| 2019-01-09 | AE49239 | ND |
| 2019-02-12 | AE54138 | ND |