1,2,4-Trichlorobenzene
Chowchilla City Water Department
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2015-07-29 | 5810-003-0800 | ND |
| 2015-07-29 | 5810-008-0820 | ND |
| 2015-08-03 | 5810-010-0915 | ND |
| 2016-08-30 | 5810-001-0901 | ND |
| 2016-08-30 | 5810-019-0901 | ND |
| 2017-03-28 | 5810-011-1515 | ND |
| 2017-03-28 | 5810-020-1614 | ND |
| 2018-05-30 | 5810-023-1300 | ND |
| 2018-09-05 | 5810-003-0825 | ND |
| 2018-09-05 | 5810-010-0752 | ND |
| 2018-09-05 | 5810-020-0740 | ND |
| 2019-08-13 | 5810-019-0739 | ND |
| 2019-09-16 | 5810-023-1045 | ND |