1,2,4-Trichlorobenzene
Walnut Park Mutual Water Company
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 | 3 | 0 | ND |
| 2015 | ND | 3 | 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 |
|---|---|---|
| 2014-01-24 | 9588-003-0940 | ND |
| 2014-04-11 | 9588-004-0930 | ND |
| 2014-12-16 | 9588-008-1017 | ND |
| 2015-01-30 | 9588-003-0919 | ND |
| 2015-04-22 | 9588-004-1003 | ND |
| 2015-10-21 | 9588-008-0950 | ND |
| 2016-01-20 | 9588-003-0945 | ND |
| 2016-06-22 | 9588-004-0950 | ND |
| 2016-10-19 | 9588-008-0000 | ND |
| 2017-01-18 | 9588-003-1005 | ND |
| 2017-04-20 | 9588-004-0940 | ND |
| 2017-10-17 | 9588-008-0749 | ND |
| 2018-01-16 | 9588-003-0754 | ND |
| 2018-04-17 | 9588-004-0709 | ND |
| 2018-12-18 | 9588-008-0800 | ND |
| 2019-01-24 | 9588-008-0839 | ND |
| 2019-01-24 | 9588-003-0750 | ND |
| 2019-04-23 | 9588-004-0850 | ND |