1,2,4-Trichlorobenzene
Meadow District
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 | 6 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2014-06-30 | S504511 | ND |
| 2014-07-24 | L5171754-3 | ND |
| 2014-07-24 | L5171754-2 | ND |
| 2014-08-25 | S479228 | ND |
| 2014-08-25 | S479187 | ND |
| 2014-10-24 | S251490 | ND |
| 2015-01-22 | S588750 | ND |
| 2015-08-12 | S612424 | ND |
| 2015-08-12 | S612423 | ND |
| 2015-10-20 | S614748 | ND |
| 2016-03-01 | S659176 | ND |
| 2016-08-17 | S670377 | ND |
| 2016-08-17 | S670376 | ND |
| 2017-01-25 | S670508 | ND |
| 2017-07-25 | S730815 | ND |
| 2017-07-25 | S679349 | ND |
| 2017-08-29 | S730913 | ND |
| 2017-08-29 | S730909 | ND |
| 2018-08-30 | S812183 | ND |
| 2018-08-30 | S812179 | ND |
| 2018-11-09 | S812573 | ND |
| 2019-08-01 | S898798 | ND |
| 2019-08-01 | S898802 | ND |