1,2,4-Trichlorobenzene
East Hempfield Water Authority
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 | 7 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-09-30 | 14032956-01 | ND |
| 2014-09-30 | 14032956-02 | ND |
| 2014-09-30 | 14032956-03 | ND |
| 2014-09-30 | 14032956-04 | ND |
| 2014-12-29 | 14122146-01 | ND |
| 2014-12-29 | 14122146-02 | ND |
| 2014-12-29 | 14122146-03 | ND |
| 2015-09-15 | 13360702 | ND |
| 2015-09-15 | 13360723 | ND |
| 2015-09-15 | 13360681 | ND |
| 2015-09-15 | 13360744 | ND |
| 2016-12-27 | 15481329 | ND |
| 2016-12-27 | 15481308 | ND |
| 2016-12-27 | 15481350 | ND |
| 2016-12-27 | 15481287 | ND |
| 2017-03-16 | 15901252 | ND |
| 2017-03-16 | 15901273 | ND |
| 2017-03-16 | 15901501 | ND |
| 2017-03-16 | 15901294 | ND |
| 2017-03-16 | 15901231 | ND |
| 2017-05-23 | 16218709 | ND |
| 2017-05-23 | 16218730 | ND |
| 2017-05-23 | 16218460 | ND |
| 2017-05-23 | 16218439 | ND |
| 2017-08-30 | 16844195 | ND |
| 2017-08-30 | 16844216 | ND |
| 2017-11-15 | 17129197 | ND |
| 2017-11-15 | 17129176 | ND |
| 2018-02-28 | 7104860-01 | ND |
| 2018-06-06 | 8044976-01 | ND |
| 2018-06-06 | 8044976-02 | ND |
| 2018-06-06 | 8044976-03 | ND |
| 2018-11-19 | 8015122-01 | ND |
| 2019-05-20 | 9045072-01 | ND |
| 2019-05-20 | 9045072-02 | ND |
| 2019-05-20 | 9045072-03 | ND |
| 2019-08-21 | 9085002-03 | ND |