1,2,4-Trichlorobenzene
City of Arp
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 | 2 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-03-26 | Q1812082001 | ND |
| 2018-03-26 | Q1812082010 | ND |
| 2019-03-20 | Q1911657006 | ND |
| 2019-03-20 | Q1911657009 | ND |
| 2019-06-04 | Q1931258003 | ND |
| 2019-09-05 | Q1962480003 | ND |
| 2020-12-01 | Q2047579001 | ND |
| 2020-12-01 | Q2047579003 | ND |
| 2021-06-10 | Q2115262009 | ND |
| 2021-06-10 | Q2115262011 | ND |
| 2022-03-30 | Q2209980005 | ND |
| 2022-03-30 | Q2209980007 | ND |
| 2023-02-23 | Q2307630001 | ND |
| 2023-06-01 | Q2320524006 | ND |