1,2,4-Trichlorobenzene
Upper Hanover 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 | 4 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 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 |
|---|---|---|
| 2014-03-12 | 140010201 | ND |
| 2014-03-12 | 140010202 | ND |
| 2014-03-12 | 140010203 | ND |
| 2014-03-12 | 140010200 | ND |
| 2015-02-18 | 12402272 | ND |
| 2015-02-18 | 12402293 | ND |
| 2015-03-04 | 12516082 | ND |
| 2016-02-03 | 13753519 | ND |
| 2016-02-03 | 13753477 | ND |
| 2016-02-03 | 13753498 | ND |
| 2017-09-26 | 16727584 | ND |
| 2017-09-26 | 16727583 | ND |
| 2017-09-26 | 16727582 | ND |
| 2017-09-26 | 16727581 | ND |
| 2017-11-22 | 17024137 | ND |
| 2018-01-30 | 8001978-01 | ND |
| 2018-04-25 | 8008140-01 | ND |
| 2018-07-17 | 8017906-01 | ND |
| 2018-07-25 | 8019752-01 | ND |
| 2018-07-25 | 8019752-02 | ND |
| 2018-10-10 | 8028641-01 | ND |
| 2019-01-23 | 8038660-01 | ND |
| 2019-05-07 | 9009685-01 | ND |
| 2019-08-21 | 8038658-01 | ND |
| 2019-09-24 | 9034252-01 | ND |
| 2019-12-11 | 9033962-01 | ND |