1,2,4-Trichlorobenzene
Oblates of St. Francis
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 | 4 | 0 | ND |
| 2015 | 0.230 ppb | 4 | 1 | ND - 0.920 ppb |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-02-25 | 1071359_01_03819 | ND |
| 2014-04-04 | 1071359_01_04372 | ND |
| 2014-07-11 | 1071359_01_00013 | ND |
| 2014-11-03 | 1071359_01_00166 | ND |
| 2015-01-15 | 1071359_01_00220 | ND |
| 2015-05-14 | E15003550001 | 0.920 ppb |
| 2015-07-01 | E16000018001 | ND |
| 2015-10-01 | E16001420001 | ND |
| 2016-03-23 | E16003505001 | ND |
| 2017-06-09 | E17004877001 | ND |