1,2,4-Trichlorobenzene
Clearbrooke Estates Pump District
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 | 3 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 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 |
---|---|---|
2014-04-15 | S479172 | ND |
2014-08-26 | S588720 | ND |
2014-08-26 | S588722 | ND |
2015-08-20 | S614713 | ND |
2015-08-20 | S614714 | ND |
2016-08-09 | S670427 | ND |
2016-08-09 | S670428 | ND |
2017-04-20 | S730803 | ND |
2017-08-29 | S737126 | ND |
2017-08-29 | S737130 | ND |
2018-08-30 | S812123 | ND |
2018-08-30 | S812127 | ND |
2018-08-30 | S812128 | ND |
2019-08-21 | S865032 | ND |
2019-08-21 | S865036 | ND |