1,2,4-Trichlorobenzene
Penn State Univ.
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 | 14 | 0 | ND |
| 2015 | ND | 7 | 0 | ND |
| 2016 | ND | 24 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 9 | 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 |
|---|---|---|
| 2014-01-23 | 4A23025-06 | ND |
| 2014-01-23 | 4A23025-07 | ND |
| 2014-01-23 | 4A23033-06 | ND |
| 2014-02-20 | 4B20042-07 | ND |
| 2014-02-20 | 4B20042-06 | ND |
| 2014-02-20 | 4B20041-07 | ND |
| 2014-03-11 | 4C11016-07 | ND |
| 2014-03-11 | 4C11027-07 | ND |
| 2014-03-11 | 4C11016-06 | ND |
| 2014-04-09 | 4D09031-01 | ND |
| 2014-04-09 | 4D09037-01 | ND |
| 2014-04-09 | 4D09036-01 | ND |
| 2014-06-11 | 4F11107-04 | ND |
| 2014-06-11 | 4F11107-05 | ND |
| 2015-01-21 | 13561261 | ND |
| 2015-11-11 | 13561197 | ND |
| 2015-11-11 | 13561149 | ND |
| 2015-11-11 | 13561173 | ND |
| 2015-12-10 | 13681457 | ND |
| 2015-12-10 | 13681502 | ND |
| 2015-12-10 | 13681456 | ND |
| 2016-02-23 | 13917082 | ND |
| 2016-02-23 | 13917055 | ND |
| 2016-02-23 | 13917081 | ND |
| 2016-03-16 | 14032192 | ND |
| 2016-03-16 | 14032215 | ND |
| 2016-03-16 | 14032169 | ND |
| 2016-04-20 | 14163567 | ND |
| 2016-04-20 | 14163568 | ND |
| 2016-04-20 | 14163541 | ND |
| 2016-05-18 | 14312875 | ND |
| 2016-05-18 | 14312876 | ND |
| 2016-05-18 | 14312921 | ND |
| 2016-06-21 | 14471198 | ND |
| 2016-06-21 | 14471199 | ND |
| 2016-06-21 | 14471246 | ND |
| 2016-07-19 | 14636441 | ND |
| 2016-07-19 | 14636440 | ND |
| 2016-07-19 | 14636413 | ND |
| 2016-08-23 | 14804495 | ND |
| 2016-08-23 | 14804470 | ND |
| 2016-08-23 | 14804520 | ND |
| 2016-09-28 | 14975857 | ND |
| 2016-09-28 | 14975856 | ND |
| 2016-09-28 | 14975904 | ND |
| 2017-01-17 | 15573213 | ND |
| 2017-01-17 | 15573212 | ND |
| 2017-01-18 | 15573185 | ND |
| 2017-02-23 | 15709626 | ND |
| 2017-02-23 | 15709625 | ND |
| 2017-03-23 | 15850690 | ND |
| 2017-03-28 | 15850818 | ND |
| 2017-04-18 | 16001558 | ND |
| 2017-04-18 | 16001557 | ND |
| 2017-07-12 | 16473278 | ND |
| 2017-08-03 | 16629354 | ND |
| 2017-10-31 | 16937415 | ND |
| 2017-11-30 | 17077355 | ND |
| 2018-01-31 | 8A31018-01 | ND |
| 2018-02-20 | 8B21092-08 | ND |
| 2018-02-22 | 8B23070-07 | ND |
| 2018-04-11 | 8D12138-07 | ND |
| 2018-04-26 | 8D27100-10 | ND |
| 2018-06-01 | 8F01151-05 | ND |
| 2018-07-11 | 8G12180-04 | ND |
| 2018-08-01 | 8H02080-01 | ND |
| 2018-10-04 | 8J05241-01 | ND |
| 2019-02-21 | 9B22087-01 | ND |
| 2019-05-09 | 9E13165-01 | ND |
| 2019-08-14 | 9H15241-01 | ND |
| 2019-10-24 | 9J28033-01 | ND |