1,2,4-Trichlorobenzene
North Wales 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 | 12 | 0 | ND |
| 2015 | ND | 13 | 0 | ND |
| 2016 | ND | 14 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 13 | 0 | ND |
| 2019 | ND | 12 | 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 |
|---|---|---|
| 2014-03-04 | 20140745 | ND |
| 2014-03-17 | 20140959 | ND |
| 2014-03-17 | 20140958 | ND |
| 2014-03-17 | 20140966 | ND |
| 2014-03-17 | 20140965 | ND |
| 2014-03-17 | 20140964 | ND |
| 2014-03-17 | 20140963 | ND |
| 2014-03-17 | 20140962 | ND |
| 2014-03-17 | 20140961 | ND |
| 2014-03-17 | 20140960 | ND |
| 2014-06-10 | 20141963 | ND |
| 2014-08-05 | 20142640 | ND |
| 2015-03-10 | 12516857 | ND |
| 2015-03-16 | 12516752 | ND |
| 2015-03-16 | 12516836 | ND |
| 2015-03-16 | 12516815 | ND |
| 2015-03-16 | 12516794 | ND |
| 2015-03-16 | 12516773 | ND |
| 2015-03-16 | 12516731 | ND |
| 2015-03-16 | 12516710 | ND |
| 2015-03-16 | 12516689 | ND |
| 2015-03-16 | 12516668 | ND |
| 2015-07-06 | 13014439 | ND |
| 2015-09-14 | 13265879 | ND |
| 2015-12-01 | 13634662 | ND |
| 2016-03-07 | 13987487 | ND |
| 2016-03-14 | 13987424 | ND |
| 2016-03-14 | 13987466 | ND |
| 2016-03-14 | 13987445 | ND |
| 2016-03-14 | 13987403 | ND |
| 2016-03-14 | 13987382 | ND |
| 2016-03-14 | 13987361 | ND |
| 2016-03-14 | 13987340 | ND |
| 2016-03-14 | 13987319 | ND |
| 2016-03-14 | 13987298 | ND |
| 2016-06-07 | 14407368 | ND |
| 2016-06-29 | 14407395 | ND |
| 2016-09-06 | 14909844 | ND |
| 2016-12-06 | 15374012 | ND |
| 2017-03-16 | 15797855 | ND |
| 2017-05-01 | 16096361 | ND |
| 2017-05-01 | 16096340 | ND |
| 2017-05-01 | 16096277 | ND |
| 2017-05-01 | 16096445 | ND |
| 2017-05-01 | 16096298 | ND |
| 2017-05-01 | 16096424 | ND |
| 2017-05-01 | 16096403 | ND |
| 2017-05-01 | 16096319 | ND |
| 2017-05-01 | 16096382 | ND |
| 2017-06-06 | 16259046 | ND |
| 2017-09-05 | 16728646 | ND |
| 2017-12-05 | 17163808 | ND |
| 2018-03-12 | 20180936 | ND |
| 2018-03-12 | 20180937 | ND |
| 2018-03-12 | 20180935 | ND |
| 2018-03-12 | 20180938 | ND |
| 2018-03-12 | 20180934 | ND |
| 2018-03-12 | 20180939 | ND |
| 2018-03-12 | 20180933 | ND |
| 2018-03-12 | 20180940 | ND |
| 2018-03-12 | 20180932 | ND |
| 2018-03-13 | 20180956 | ND |
| 2018-06-05 | 20182148 | ND |
| 2018-09-04 | 20183373 | ND |
| 2018-12-18 | 20184775 | ND |
| 2019-03-05 | 20190857 | ND |
| 2019-03-12 | 20190961 | ND |
| 2019-03-12 | 20190960 | ND |
| 2019-03-12 | 20190962 | ND |
| 2019-03-12 | 20190959 | ND |
| 2019-03-12 | 20190963 | ND |
| 2019-03-12 | 20190958 | ND |
| 2019-03-12 | 20190964 | ND |
| 2019-03-12 | 20190957 | ND |
| 2019-03-12 | 20190956 | ND |
| 2019-09-03 | 20193443 | ND |
| 2019-12-03 | 20194748 | ND |