1,2,4-Trichlorobenzene
Loudoun Water - Central System
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-05-15 | 92201785003VOC | ND |
| 2014-09-29 | 92219401003_VOC | ND |
| 2015-08-10 | 460165-PACE ANAL | ND |
| 2016-07-11 | 92304827001_VOC | ND |
| 2018-07-10 | 92391869001_VOC | ND |
| 2018-08-13 | 92395631008_VOC | ND |
| 2018-10-30 | 92405860001_VOC | ND |
| 2019-01-15 | 92414268001_VOC | ND |
| 2019-05-22 | 92430328001_VOC | ND |
| 2019-08-27 | 92443218002_VOC | ND |
| 2019-10-15 | 92450083002_VOC | ND |