1,2,4-Trichlorobenzene
Verona Waterworks
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 | 9 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-03-17 | 123462001 | ND |
| 2014-06-10 | 138119001 | ND |
| 2014-08-20 | 152641001 | ND |
| 2014-09-24 | 159456001 | ND |
| 2014-09-24 | 159458001 | ND |
| 2014-09-24 | 159453001 | ND |
| 2014-09-24 | 159451001 | ND |
| 2014-10-07 | 162051001 | ND |
| 2014-12-08 | 171343001 | ND |
| 2015-08-17 | 211952001 | ND |
| 2015-08-17 | 211954001 | ND |
| 2016-08-23 | 273571001 | ND |
| 2016-08-23 | 273555001 | ND |
| 2017-08-28 | 338309001 | ND |
| 2017-08-28 | 338312001 | ND |
| 2017-08-28 | 338307001 | ND |
| 2017-08-28 | 338306001 | ND |
| 2017-08-28 | 338311001 | ND |
| 2017-08-29 | 338627001 | ND |
| 2018-08-29 | 404005001 | ND |
| 2019-08-27 | 466100001 | ND |