1,2,4-Trichlorobenzene
Domestic Water Company Royal Forest 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 | N/A | 0 | 0 | N/A |
2015 | ND | 1 | 0 | ND |
2016 | ND | 6 | 0 | ND |
2017 | ND | 2 | 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 |
---|---|---|
2015-09-09 | AD06564 | ND |
2016-01-21 | AD19275 | ND |
2016-01-21 | AD19279 | ND |
2016-01-21 | AD19281 | ND |
2016-04-12 | AD32821 | ND |
2016-07-18 | AD44549 | ND |
2016-12-08 | AD61394 | ND |
2017-02-09 | AD69960 | ND |
2017-10-24 | AE01831 | ND |
2018-05-09 | AE25755 | ND |
2018-05-09 | AE25753 | ND |
2019-03-04 | AE56881 | ND |
2019-03-04 | AE56877 | ND |