1,2,4-Trichlorobenzene
City of Tacoma
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 4 | 0 | ND |
2015 | ND | 17 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-11-13 | 29191 | ND |
2014-11-14 | 29192 | ND |
2014-11-18 | 30352 | ND |
2014-12-02 | 34852 | ND |
2015-06-08 | 27944 | ND |
2015-08-05 | 85793 | ND |
2015-12-01 | 38661 | ND |
2015-12-01 | 38661 | ND |
2015-12-01 | 38661 | ND |
2015-12-01 | 38661 | ND |
2015-12-02 | 38662 | ND |
2015-12-02 | 38662 | ND |
2015-12-02 | 38662 | ND |
2015-12-02 | 38662 | ND |
2015-12-03 | 38663 | ND |
2015-12-03 | 38663 | ND |
2015-12-03 | 38663 | ND |
2015-12-03 | 38663 | ND |
2015-12-07 | 41682 | ND |
2015-12-07 | 41681 | ND |
2015-12-08 | 41683 | ND |
2016-04-06 | ND | |
2017-05-10 | ND | |
2017-05-10 | ND | |
2017-10-10 | ND | |
2018-02-07 | ND | |
2018-03-12 | ND | |
2018-03-19 | ND | |
2019-01-02 | ND | |
2019-07-24 | ND | |
2019-12-03 | ND |