1,2,4-Trichlorobenzene
Bellaire Public Water System
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 |
|---|---|---|---|---|
| 2018 | ND | 29 | 0 | ND |
| 2019 | ND | 36 | 0 | ND |
| 2020 | ND | 36 | 0 | ND |
| 2021 | ND | 37 | 0 | ND |
| 2022 | ND | 35 | 0 | ND |
| 2023 | ND | 34 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-01-01 | A180540132 | ND |
| 2018-04-02 | 18040150 | ND |
| 2018-04-02 | 18040151 | ND |
| 2018-04-02 | 18040152 | ND |
| 2018-05-01 | 18050148 | ND |
| 2018-05-01 | 18050149 | ND |
| 2018-05-01 | 18050150 | ND |
| 2018-06-04 | 18060374 | ND |
| 2018-06-04 | 18060375 | ND |
| 2018-06-04 | 18060376 | ND |
| 2018-07-02 | 18070369 | ND |
| 2018-07-02 | 18070370 | ND |
| 2018-07-02 | 18070371 | ND |
| 2018-08-06 | 18081185 | ND |
| 2018-08-06 | 18081186 | ND |
| 2018-08-06 | 18081187 | ND |
| 2018-08-06 | 18081188 | ND |
| 2018-09-03 | 18091678 | ND |
| 2018-09-03 | 18091679 | ND |
| 2018-09-03 | 18091680 | ND |
| 2018-10-04 | 18101621 | ND |
| 2018-10-04 | 18101623 | ND |
| 2018-10-04 | 18101624 | ND |
| 2018-11-05 | 18111588 | ND |
| 2018-11-05 | 18111590 | ND |
| 2018-11-05 | 18111591 | ND |
| 2018-12-03 | 18121616 | ND |
| 2018-12-03 | 18121618 | ND |
| 2018-12-03 | 18121619 | ND |
| 2019-01-01 | 19010939 | ND |
| 2019-01-01 | 19010941 | ND |
| 2019-01-01 | 19010942 | ND |
| 2019-02-04 | 19021279 | ND |
| 2019-02-04 | 19021280 | ND |
| 2019-02-04 | 19021281 | ND |
| 2019-04-01 | 19041100 | ND |
| 2019-04-01 | 19041102 | ND |
| 2019-04-01 | 19041103 | ND |
| 2019-05-06 | 19040941 | ND |
| 2019-05-06 | 19050939 | ND |
| 2019-05-06 | 19050942 | ND |
| 2019-06-03 | 19061391 | ND |
| 2019-06-03 | 19061393 | ND |
| 2019-06-03 | 19061394 | ND |
| 2019-07-01 | 19071448 | ND |
| 2019-07-01 | 19071450 | ND |
| 2019-07-01 | 19071451 | ND |
| 2019-07-22 | 19073456 | ND |
| 2019-07-22 | 19073457 | ND |
| 2019-08-04 | 19081807 | ND |
| 2019-08-04 | 19081809 | ND |
| 2019-08-04 | 19081810 | ND |
| 2019-09-02 | 19091330 | ND |
| 2019-09-02 | 19091331 | ND |
| 2019-09-02 | 19091332 | ND |
| 2019-09-02 | 19091333 | ND |
| 2019-10-03 | 19101035 | ND |
| 2019-10-03 | 19101037 | ND |
| 2019-10-03 | 19101038 | ND |
| 2019-11-04 | 19110365 | ND |
| 2019-11-04 | 19110366 | ND |
| 2019-11-04 | 19110367 | ND |
| 2019-12-02 | 19120505 | ND |
| 2019-12-02 | 19120506 | ND |
| 2019-12-02 | 19120507 | ND |
| 2020-01-06 | 20010673 | ND |
| 2020-01-06 | 20010674 | ND |
| 2020-01-06 | 20010675 | ND |
| 2020-02-03 | 20020175 | ND |
| 2020-02-03 | 20020176 | ND |
| 2020-02-03 | 20020177 | ND |
| 2020-03-02 | 20030325 | ND |
| 2020-03-02 | 20030326 | ND |
| 2020-03-02 | 20030327 | ND |
| 2020-04-06 | 20040811 | ND |
| 2020-04-06 | 20040812 | ND |
| 2020-04-06 | 20040813 | ND |
| 2020-05-04 | 20050341 | ND |
| 2020-05-04 | 20050342 | ND |
| 2020-05-04 | 20050343 | ND |
| 2020-06-01 | 20060358 | ND |
| 2020-06-01 | 20060359 | ND |
| 2020-06-01 | 20060360 | ND |
| 2020-07-06 | 20070991 | ND |
| 2020-07-06 | 20070992 | ND |
| 2020-07-06 | 20070993 | ND |
| 2020-08-03 | 20080223 | ND |
| 2020-08-03 | 20080224 | ND |
| 2020-08-03 | 20080225 | ND |
| 2020-09-07 | 20091024 | ND |
| 2020-09-07 | 20091025 | ND |
| 2020-09-07 | 20091026 | ND |
| 2020-10-05 | 20100716 | ND |
| 2020-10-05 | 20100717 | ND |
| 2020-10-05 | 20100718 | ND |
| 2020-11-02 | 20110131 | ND |
| 2020-11-02 | 20110132 | ND |
| 2020-11-02 | 20110133 | ND |
| 2020-12-07 | 20121576 | ND |
| 2020-12-07 | 20121577 | ND |
| 2020-12-07 | 20121578 | ND |
| 2021-01-04 | 21010278 | ND |
| 2021-01-04 | 21010279 | ND |
| 2021-01-04 | 21010280 | ND |
| 2021-02-01 | 21020313 | ND |
| 2021-02-01 | 21020314 | ND |
| 2021-02-01 | 21020315 | ND |
| 2021-03-01 | 21030349 | ND |
| 2021-03-01 | 21030350 | ND |
| 2021-03-01 | 21030351 | ND |
| 2021-04-05 | 21040569 | ND |
| 2021-04-05 | 21040570 | ND |
| 2021-04-05 | 21040571 | ND |
| 2021-05-03 | 21050327 | ND |
| 2021-05-03 | 21050328 | ND |
| 2021-05-03 | 21050329 | ND |
| 2021-06-07 | 21061475 | ND |
| 2021-06-07 | 21061476 | ND |
| 2021-06-07 | 21061477 | ND |
| 2021-07-05 | 21070420 | ND |
| 2021-07-05 | 21070421 | ND |
| 2021-07-05 | 21070422 | ND |
| 2021-08-02 | 21080419 | ND |
| 2021-08-02 | 21080420 | ND |
| 2021-08-02 | 21080421 | ND |
| 2021-09-06 | 21090817 | ND |
| 2021-09-06 | 21090818 | ND |
| 2021-09-06 | 21090819 | ND |
| 2021-10-04 | 21100495 | ND |
| 2021-10-04 | 21100496 | ND |
| 2021-10-04 | 21100497 | ND |
| 2021-10-04 | 21100498 | ND |
| 2021-11-01 | 21110322 | ND |
| 2021-11-01 | 21110323 | ND |
| 2021-11-01 | 21110324 | ND |
| 2021-12-06 | 21121043 | ND |
| 2021-12-06 | 21121044 | ND |
| 2021-12-06 | 21121045 | ND |
| 2022-01-03 | 22010188 | ND |
| 2022-01-03 | 22010189 | ND |
| 2022-01-03 | 22010190 | ND |
| 2022-02-14 | 22021533 | ND |
| 2022-02-14 | 22021534 | ND |
| 2022-03-07 | 22031163 | ND |
| 2022-03-07 | 22031164 | ND |
| 2022-03-07 | 22031165 | ND |
| 2022-04-04 | 22040462 | ND |
| 2022-04-04 | 22040463 | ND |
| 2022-04-04 | 22040464 | ND |
| 2022-05-02 | 22050423 | ND |
| 2022-05-02 | 22050424 | ND |
| 2022-05-02 | 22050425 | ND |
| 2022-06-06 | 22061057 | ND |
| 2022-06-06 | 22061059 | ND |
| 2022-06-06 | 22061060 | ND |
| 2022-07-04 | 22070376 | ND |
| 2022-07-04 | 22070377 | ND |
| 2022-07-04 | 22070378 | ND |
| 2022-08-01 | 22080405 | ND |
| 2022-08-01 | 22080406 | ND |
| 2022-08-01 | 22080407 | ND |
| 2022-09-05 | 22090719 | ND |
| 2022-09-05 | 22090721 | ND |
| 2022-09-05 | 22090722 | ND |
| 2022-10-03 | 22100429 | ND |
| 2022-10-03 | 22100431 | ND |
| 2022-10-03 | 22100432 | ND |
| 2022-11-07 | 22111025 | ND |
| 2022-11-07 | 22111026 | ND |
| 2022-11-07 | 22111027 | ND |
| 2022-12-05 | 22123022 | ND |
| 2022-12-05 | 22123023 | ND |
| 2022-12-05 | 22123024 | ND |
| 2023-02-06 | 23020707 | ND |
| 2023-02-06 | 23020708 | ND |
| 2023-02-06 | 23020709 | ND |
| 2023-03-06 | 23031034 | ND |
| 2023-03-06 | 23031035 | ND |
| 2023-03-06 | 23031036 | ND |
| 2023-03-06 | 23031037 | ND |
| 2023-04-03 | 23040185 | ND |
| 2023-04-03 | 23040186 | ND |
| 2023-04-03 | 23040187 | ND |
| 2023-05-01 | 23050322 | ND |
| 2023-05-01 | 23050323 | ND |
| 2023-05-01 | 23050324 | ND |
| 2023-06-05 | 23060814 | ND |
| 2023-06-05 | 23060815 | ND |
| 2023-06-05 | 23060816 | ND |
| 2023-07-10 | 23071401 | ND |
| 2023-07-10 | 23071402 | ND |
| 2023-07-10 | 23071404 | ND |
| 2023-08-14 | 23082241 | ND |
| 2023-08-14 | 23082242 | ND |
| 2023-08-14 | 23082244 | ND |
| 2023-09-04 | 23090342 | ND |
| 2023-09-04 | 23090343 | ND |
| 2023-09-04 | 23090345 | ND |
| 2023-10-02 | 23100405 | ND |
| 2023-10-02 | 23100406 | ND |
| 2023-10-02 | 23100408 | ND |
| 2023-11-06 | 23110843 | ND |
| 2023-11-06 | 23110844 | ND |
| 2023-11-06 | 23110846 | ND |
| 2023-12-04 | 23120458 | ND |
| 2023-12-04 | 23120460 | ND |
| 2023-12-04 | 23120461 | ND |