1,2,4-Trichlorobenzene
Cedar Hills Water Association
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 | 2 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 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 |
|---|---|---|
| 2014-03-21 | G14030536-001D | ND |
| 2014-11-20 | G14110327-001 V | ND |
| 2015-03-18 | G15030402-001F | ND |
| 2015-05-12 | G15050230-001C | ND |
| 2015-09-22 | G15090429-001C | ND |
| 2015-12-01 | G15120003-001C | ND |
| 2016-12-19 | G16120265-001A | ND |
| 2017-02-27 | G17020404-001F | ND |
| 2017-02-27 | G17020405-001C | ND |
| 2018-10-03 | G18100105-001A | ND |