1,2,4-Trichlorobenzene
Bryan County Rural Water District #9
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 | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2019-02-05 | SDWA-1348197-00 | ND |
| 2019-03-20 | SDWA-1361036-00 | ND |
| 2019-07-29 | SDWA-1392189-00 | ND |
| 2019-10-21 | SDWA-1424852-00 | ND |
| 2020-01-27 | SDWA-1456770-00 | ND |
| 2020-08-17 | SDWA-1506236-00 | ND |
| 2021-03-16 | SDWA-1554024-00 | ND |
| 2022-01-19 | SDWA-1662225-00 | ND |
| 2022-05-02 | SDWA-1693891-00 | ND |
| 2022-09-15 | SDWA-1711575-00 | ND |
| 2022-11-14 | SDWA-1744625-00 | ND |
| 2023-02-06 | SDWA-1766601-00 | ND |
| 2023-02-06 | SDWA-1766608-00 | ND |
| 2023-02-06 | SDWA-1766614-00 | ND |
| 2023-02-06 | SDWA-1766620-00 | ND |
| 2023-04-03 | SDWA-1789829-00 | ND |
| 2023-07-24 | SDWA-1815392-00 | ND |