1,2,4-Trichlorobenzene
Onalaska 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 5 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 7 | 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 |
|---|---|---|
| 2014-07-08 | 4070275-01 | ND |
| 2014-07-08 | 4070279-03 | ND |
| 2014-07-08 | 4070279-02 | ND |
| 2014-07-08 | 4070279-04 | ND |
| 2014-11-06 | 4110207-01 | ND |
| 2015-02-10 | 5020284-02 | ND |
| 2015-06-26 | 5061036-01 | ND |
| 2015-09-10 | 5090443-01 | ND |
| 2015-11-03 | 5110077-01 | ND |
| 2016-02-16 | 6020498-01 | ND |
| 2016-04-28 | 6041104-01 | ND |
| 2016-06-15 | 6060645-01 | ND |
| 2016-08-11 | 6080496-01 | ND |
| 2016-10-19 | 6100648-01 | ND |
| 2017-02-15 | 17B0533-01 | ND |
| 2017-04-04 | 17D0078-03 | ND |
| 2017-04-18 | 17D0620-03 | ND |
| 2017-04-18 | 17D0620-04 | ND |
| 2017-04-18 | 17D0620-02 | ND |
| 2017-07-11 | 17G0287-03 | ND |
| 2017-10-05 | 17J0221-01 | ND |
| 2018-01-30 | 18A0837-01 | ND |
| 2019-01-30 | 19A0901-02 | ND |