1,2,4-Trichlorobenzene
Rosebrook Water
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 | 5 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 5 | 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 | 128211.01 | ND |
| 2014-04-08 | 130316.01 | ND |
| 2014-07-01 | 133130.01 | ND |
| 2014-10-07 | 136569.01 | ND |
| 2014-10-07 | 136570.01 | ND |
| 2015-03-03 | 140973.01 | ND |
| 2015-04-07 | 141939.01 | ND |
| 2015-07-21 | 145948.01 | ND |
| 2015-10-19 | 149322.01 | ND |
| 2015-10-19 | 149322.02 | ND |
| 2016-01-05 | 151873.01 | ND |
| 2016-04-11 | 154734.01 | ND |
| 2016-07-05 | 157890.01 | ND |
| 2016-10-04 | 161154.01 | ND |
| 2016-10-04 | 161151.01 | ND |
| 2017-01-03 | 164323.01 | ND |
| 2017-04-04 | 167117.01 | ND |
| 2017-07-11 | 170838.01 | ND |
| 2017-10-03 | 174156.01 | ND |
| 2017-10-03 | 174164.01 | ND |
| 2018-01-09 | 177705.01 | ND |
| 2018-04-03 | 180179.01 | ND |
| 2018-08-14 | 185436.01 | ND |
| 2018-08-14 | 185435.01 | ND |
| 2018-11-06 | 188759.01 | ND |
| 2018-12-28 | 190707.01 | ND |
| 2019-01-08 | 191004.01 | ND |
| 2019-05-09 | 195257.01 | ND |
| 2019-09-03 | 199820.01 | ND |
| 2019-11-12 | 203281.01 | ND |
| 2019-11-12 | 203281.02 | ND |