1,2,4-Trichlorobenzene
Washington County Rural Water District 1
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 | 5 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-07-28 | 160298 | ND |
| 2014-07-28 | 160299 | ND |
| 2014-07-28 | 160300 | ND |
| 2014-07-28 | 160301 | ND |
| 2014-07-28 | 160302 | ND |
| 2017-07-24 | 803103 | ND |
| 2017-07-31 | 808386 | ND |
| 2017-07-31 | 808388 | ND |
| 2017-07-31 | 808390 | ND |
| 2018-03-06 | 931679 | ND |
| 2018-05-14 | 970931 | ND |
| 2018-08-20 | 1029042 | ND |
| 2018-11-26 | 1081327 | ND |
| 2019-02-25 | 1126145 | ND |
| 2019-05-20 | 1158024 | ND |