1,2,4-Trichlorobenzene
Chester 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2014-01-14 | 1402243 | ND |
| 2014-04-09 | 14042012-001 | ND |
| 2014-07-09 | 14071080-001 | ND |
| 2014-09-30 | 1438033 | ND |
| 2015-01-09 | 12284621 | ND |
| 2015-04-06 | 12630639 | ND |
| 2015-07-08 | 13010241 | ND |
| 2015-10-07 | 13386907 | ND |
| 2016-01-07 | 13750389 | ND |
| 2016-04-07 | 14100351 | ND |
| 2016-07-07 | 14567350 | ND |
| 2016-10-07 | 15073217 | ND |
| 2017-01-10 | 15514899 | ND |
| 2017-04-11 | 15934412 | ND |
| 2017-07-07 | 16410456 | ND |
| 2017-10-11 | 16877403 | ND |
| 2018-01-09 | 2287664001 | ND |
| 2018-05-15 | 8012319-01 | ND |
| 2018-07-12 | 8020049-01 | ND |
| 2019-07-10 | 3044796001 | ND |