1,2,4-Trichlorobenzene
Aqua Pa Bristol
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 | 5 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-01-10 | AE20136 | ND |
| 2014-04-17 | AE29694 | ND |
| 2014-04-17 | AE29704 | ND |
| 2014-07-25 | AE41526 | ND |
| 2014-10-10 | AE52027 | ND |
| 2015-01-09 | 12271450 | ND |
| 2015-02-06 | 12387475 | ND |
| 2015-04-17 | 12618230 | ND |
| 2015-07-31 | 12998799 | ND |
| 2015-10-16 | 13375692 | ND |
| 2016-01-06 | 13738140 | ND |
| 2016-01-15 | 13738161 | ND |
| 2016-04-15 | 14086767 | ND |
| 2016-07-21 | 14550547 | ND |
| 2016-10-26 | 15059923 | ND |
| 2017-01-06 | 15499336 | ND |
| 2017-04-07 | 15919076 | ND |
| 2017-08-18 | 16547704 | ND |
| 2017-09-21 | 16709704 | ND |
| 2018-02-02 | AF75113 | ND |
| 2018-02-22 | AF76987 | ND |
| 2019-02-01 | AG07157 | ND |
| 2019-03-07 | AG10696 | ND |
| 2019-04-12 | AG14108 | ND |