1,2,4-Trichlorobenzene
Watertown Town Water District 3 & 4
NOTE: Watertown Town Water District 3 & 4 purchases water from Watertown City which is required to test for 1,2,4-trichlorobenzene. Sample information shown below was taken by Watertown City.
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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
NOTE: Watertown Town Water District 3 & 4 purchases water from Watertown City which is required to test for 1,2,4-trichlorobenzene. Sample information shown below was taken by Watertown City.
| Date | Lab ID | Result |
|---|---|---|
| 2019-07-10 | 1910987-001 | ND |
| 2020-07-09 | 2010531-001AB | ND |
| 2021-07-21 | 2111886-001 | ND |
| 2022-07-07 | 2210345-001 | ND |
| 2023-07-06 | 2309810-001 | ND |