1,2,4-Trichlorobenzene
Pennichuck Water Works
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-08-07 | 1408-00208-001 | ND |
| 2014-09-22 | 1409-01461-001 | ND |
| 2015-07-09 | 1507-00792-001 | ND |
| 2015-09-16 | 1509-01287-001 | ND |
| 2016-07-18 | 1607-01781-001 | ND |
| 2016-09-07 | 1609-00701-001 | ND |
| 2017-07-20 | 1707-02341-001 | ND |
| 2017-09-06 | 1709-00673-001 | ND |
| 2018-07-12 | 1807-01403-001 | ND |
| 2018-09-17 | 1809-02211-001 | ND |
| 2019-07-17 | 1907-02592-001 | ND |
| 2019-08-27 | 1908-03725-001 | ND |