1,2,4-Trichlorobenzene
Harris County MUD 167
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 | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 5 | 0 | ND |
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 |
---|---|---|
2014-08-13 | AC63433 | ND |
2015-07-30 | AD01788 | ND |
2016-12-05 | AD60361 | ND |
2017-02-03 | AD68751 | ND |
2017-02-03 | AD68749 | ND |
2017-04-21 | AD80731 | ND |
2017-08-01 | AD91627 | ND |
2017-10-24 | AE01839 | ND |
2018-11-06 | AE45445 | ND |
2018-11-06 | AE45447 | ND |
2019-08-27 | AE81098 | ND |
2019-08-27 | AE81096 | ND |