1,2,4-Trichlorobenzene
Timberline Shores
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-01-14 | C317140-01 | ND |
| 2014-05-28 | C403321-01 | ND |
| 2014-09-23 | C412451-01 | ND |
| 2014-10-28 | C412172-01 | ND |
| 2015-01-27 | ND | |
| 2015-05-12 | ND | |
| 2015-07-21 | ND | |
| 2015-11-03 | ND | |
| 2016-02-09 | C516168-01 | ND |
| 2016-05-03 | CZ03458-01 | ND |
| 2016-08-23 | CZ08493-01 | ND |
| 2016-08-23 | CZ08493-03 | ND |
| 2016-10-25 | CZ13897-01 | ND |
| 2017-11-07 | CA13352-01 | ND |
| 2018-10-09 | CB14439-01 | ND |
| 2019-09-11 | CC10710-01 | ND |
| 2019-10-15 | CC15967-01 | ND |