1,2,4-Trichlorobenzene
New Design - Frederick County
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2014-04-01 | 0100030_04_10797 | ND |
| 2014-05-27 | 0100030_01_05176 | ND |
| 2015-04-01 | E15003102001 | ND |
| 2015-09-10 | E16001042006 | ND |
| 2016-04-27 | 2140220007 | ND |
| 2016-06-06 | E16004621004 | ND |
| 2017-04-05 | E17003943008 | ND |
| 2017-04-05 | 2221226006 | ND |
| 2018-04-12 | E18003685006 | ND |
| 2018-05-15 | AP06061 | ND |
| 2018-06-26 | E18004642001 | ND |
| 2019-04-11 | AQ05230 | ND |
| 2019-05-07 | E19003760006 | ND |
| 2019-08-21 | E20000723001 | ND |
| 2019-12-06 | AQ17566 | ND |