1,2,4-Trichlorobenzene
St. Louis City
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-05-28 | AC26114 | ND |
2014-05-28 | AC26115 | ND |
2015-06-01 | AC47391 | ND |
2015-06-01 | AC47390 | ND |
2016-06-06 | AC75867 | ND |
2016-06-06 | AC77510 | ND |
2016-06-06 | AC75866 | ND |
2018-11-06 | CRCW110618M524 | ND |
2018-11-06 | HBCB110618M524 | ND |
2019-11-18 | CRCW111819M524 | ND |
2019-11-18 | HBCB111819M524 | ND |