1,2,4-Trichlorobenzene
St. Elmo-irvington Water Authority
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 | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-03-06 | 400-87475-2 | ND |
| 2014-03-06 | 400-87475-1 | ND |
| 2014-12-15 | 400-99672-1 | ND |
| 2015-03-18 | 400-103216-1 | ND |
| 2015-03-18 | 400-103216-2 | ND |
| 2015-10-21 | 400-112661-1 | ND |
| 2016-03-30 | 400-119520-2 | ND |
| 2016-03-30 | 400-119520-1 | ND |
| 2016-11-10 | 400-129920-1 | ND |
| 2017-03-01 | 400-134596-1 | ND |
| 2017-03-01 | 400-134596-2 | ND |
| 2017-11-06 | 400-145545-1 | ND |
| 2018-03-01 | 400-150213-2 | ND |
| 2018-03-01 | 400-150213-1 | ND |
| 2018-11-08 | 400-161795-1A | ND |
| 2019-02-18 | 680-164711-1 | ND |
| 2019-02-18 | 680-164711-2 | ND |
| 2019-11-22 | 400-180081-1 | ND |