1,2,4-Trichlorobenzene
Quail Valley Utility 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 7 | 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 |
|---|---|---|
| 2014-05-21 | Q1417154001 | ND |
| 2015-05-14 | AC92055 | ND |
| 2015-05-14 | AC92057 | ND |
| 2015-05-14 | AC92061 | ND |
| 2015-09-24 | AD08514 | ND |
| 2015-09-24 | AD08496 | ND |
| 2015-12-10 | AD16510 | ND |
| 2015-12-10 | AD16594 | ND |
| 2016-04-26 | AD34210 | ND |
| 2016-04-26 | AD34204 | ND |
| 2016-04-26 | AD34198 | ND |
| 2017-03-29 | AD77452 | ND |
| 2017-03-29 | AD77456 | ND |
| 2017-03-29 | AD77454 | ND |
| 2018-02-28 | AE16061 | ND |
| 2018-05-29 | AE27914 | ND |
| 2018-05-29 | AE27906 | ND |
| 2019-03-13 | AE58247 | ND |
| 2019-03-13 | AE58243 | ND |
| 2019-03-13 | AE58241 | ND |