1,2,4-Trichlorobenzene
Waunakee 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 | 6 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-02-10 | 769678 | ND |
| 2014-02-10 | 769683 | ND |
| 2014-02-10 | 769686 | ND |
| 2014-02-10 | 769680 | ND |
| 2014-04-16 | 780796 | ND |
| 2014-04-16 | 780797 | ND |
| 2015-03-10 | 847412 | ND |
| 2015-05-04 | 858130 | ND |
| 2015-07-27 | 873353 | ND |
| 2015-10-05 | 887254 | ND |
| 2016-08-16 | 940120 | ND |
| 2017-01-31 | 971660 | ND |
| 2017-01-31 | 971656 | ND |
| 2017-02-06 | 972337 | ND |
| 2017-04-11 | 982557 | ND |
| 2017-07-11 | 1003165 | ND |
| 2017-10-03 | 1022337 | ND |
| 2018-01-31 | 1039288 | ND |
| 2018-04-03 | 1048174 | ND |
| 2018-07-11 | 1066417 | ND |
| 2018-10-08 | 1085741 | ND |
| 2019-07-01 | 1131600 | ND |
| 2019-12-02 | 1162821 | ND |