1,2,4-Trichlorobenzene
Southern Okla Water Corp
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 | 7 | 0 | ND |
| 2015 | ND | 9 | 0 | ND |
| 2016 | ND | 14 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 6 | 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 |
|---|---|---|
| 2014-02-18 | 4B18053-01 | ND |
| 2014-03-11 | 4C11113-03 | ND |
| 2014-03-11 | 4C11113-02 | ND |
| 2014-03-11 | 4C11113-01 | ND |
| 2014-04-07 | 4D08050-01 | ND |
| 2014-07-08 | 4G08101-01 | ND |
| 2014-11-07 | 4K11043-01 | ND |
| 2015-01-20 | 5A20049-02 | ND |
| 2015-01-20 | 5A20049-01 | ND |
| 2015-01-20 | 5A20049-03 | ND |
| 2015-01-20 | 5A20049-04 | ND |
| 2015-01-20 | 5A20049-05 | ND |
| 2015-04-07 | 5D07054-01 | ND |
| 2015-07-14 | 5G14096-01 | ND |
| 2015-10-05 | 5J06077-01 | ND |
| 2015-12-16 | 5L22057-01 | ND |
| 2016-01-11 | 6A12087-04 | ND |
| 2016-01-11 | 6A12087-03 | ND |
| 2016-01-11 | 6A12087-02 | ND |
| 2016-01-11 | 6A12087-01 | ND |
| 2016-01-12 | 6A12087-07 | ND |
| 2016-01-12 | 6A12087-09 | ND |
| 2016-01-12 | 6A12087-08 | ND |
| 2016-01-12 | 6A12087-06 | ND |
| 2016-01-12 | 6A12087-05 | ND |
| 2016-02-12 | 6B16060-01 | ND |
| 2016-04-04 | 6D05093-02 | ND |
| 2016-04-04 | 6D05093-01 | ND |
| 2016-07-11 | 6G12139-01 | ND |
| 2016-10-03 | 6J04101-01 | ND |
| 2017-01-09 | 7A10127-03 | ND |
| 2017-01-09 | 7A10127-02 | ND |
| 2017-01-09 | 7A10127-01 | ND |
| 2017-01-10 | 7A10127-04 | ND |
| 2018-01-09 | 1801353 | ND |
| 2018-03-26 | AD03072-01 | ND |
| 2018-05-21 | AE22101-01 | ND |
| 2018-10-22 | AJ23113-01 | ND |
| 2018-12-12 | 1812375 | ND |
| 2018-12-21 | 1812613 | ND |
| 2019-03-29 | 1904005 | ND |
| 2019-05-06 | 1905169 | ND |
| 2019-05-06 | 1905168 | ND |
| 2019-05-06 | 1905167 | ND |
| 2019-08-20 | 1908618 | ND |
| 2019-11-19 | 1911608 | ND |