1,2,4-Trichlorobenzene
Woods of Ashbury S/d
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 | 5 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-07-31 | C408018-01 | ND |
| 2014-12-30 | C413582-01 | ND |
| 2015-03-18 | ND | |
| 2015-05-21 | ND | |
| 2015-08-27 | ND | |
| 2015-09-25 | ND | |
| 2015-10-12 | ND | |
| 2016-07-28 | CZ08530-01 | ND |
| 2016-12-19 | CZ13915-01 | ND |
| 2017-01-26 | CZ19027-01 | ND |
| 2017-07-10 | CA07889-01 | ND |
| 2018-08-24 | CB08339-01 | ND |
| 2018-08-24 | CB08339-03 | ND |
| 2018-12-05 | CB15011-03 | ND |
| 2018-12-26 | CB20251-01 | ND |
| 2019-01-22 | CB19037-01 | ND |
| 2019-01-22 | CB19037-03 | ND |
| 2019-05-02 | CC04418-01 | ND |
| 2019-08-14 | CC10759-01 | ND |
| 2019-08-14 | CC10759-03 | ND |
| 2019-10-29 | CC15996-01 | ND |