1,2,4-Trichlorobenzene
Madison Water Works
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 |
|---|---|---|---|---|
| 2012 | ND | 3 | 0 | ND |
| 2013 | ND | 2 | 0 | ND |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | 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 |
|---|---|---|
| 2012-02-16 | L560953-1V | ND |
| 2012-04-25 | L572045-1 | ND |
| 2012-12-12 | L611051-1 | ND |
| 2013-12-10 | L673256-2 | ND |
| 2013-12-10 | L673256-1 | ND |
| 2014-10-14 | L727671-1 | ND |
| 2014-10-23 | L729555-1 | ND |
| 2015-12-09 | L806002-001 | ND |
| 2015-12-09 | L806002-002 | ND |
| 2016-11-09 | L871807-2 | ND |
| 2016-11-09 | L871807-1 | ND |
| 2017-10-11 | L943310-1 | ND |
| 2017-10-11 | L943310-2 | ND |