1,2,4-Trichlorobenzene
Lake Arrowhead Subdivision
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 | 7 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-03-03 | AI28914 | ND |
2014-03-03 | AI28915 | ND |
2014-03-03 | AI28916 | ND |
2014-03-03 | AI28917 | ND |
2014-04-15 | AI38032 | ND |
2014-07-08 | AI45051 | ND |
2014-10-08 | AI57108 | ND |
2015-04-27 | AI75614 | ND |
2016-02-02 | AJ05469 | ND |
2017-04-19 | AJ53557 | ND |
2017-04-19 | AJ53558 | ND |
2017-04-19 | AJ53559 | ND |