1,2,4-Trichlorobenzene
Saint Francis Village
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 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-19 | Q1828773003 | ND |
| 2018-07-19 | Q1828773005 | ND |
| 2018-07-19 | Q1828773007 | ND |
| 2018-07-19 | Q1828773002 | ND |
| 2019-03-20 | Q1911627006 | ND |
| 2019-03-20 | Q1911627007 | ND |
| 2019-03-20 | Q1911627010 | ND |
| 2019-03-20 | Q1911627018 | ND |
| 2020-07-20 | Q2028181001 | ND |
| 2020-07-20 | Q2028181003 | ND |
| 2020-07-20 | Q2028181005 | ND |
| 2020-07-20 | Q2028181007 | ND |
| 2021-09-14 | Q2125001001 | ND |
| 2021-09-14 | Q2125001007 | ND |
| 2021-09-14 | Q2125001005 | ND |
| 2021-09-14 | Q2125001003 | ND |
| 2022-05-26 | Q2215264003 | ND |
| 2022-05-26 | Q2215264005 | ND |
| 2022-05-26 | Q2215264007 | ND |
| 2022-05-26 | Q2215264009 | ND |
| 2023-03-20 | Q2310438001 | ND |
| 2023-03-20 | Q2310438003 | ND |
| 2023-03-20 | Q2310438005 | ND |
| 2023-03-20 | Q2310438007 | ND |