1,2,4-Trichlorobenzene
Paw Penn District
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 | 8 | 0 | ND |
| 2019 | ND | 10 | 0 | ND |
| 2020 | ND | 11 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 11 | 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 |
|---|---|---|
| 2018-01-11 | 38161501 | ND |
| 2018-01-11 | 38161101 | ND |
| 2018-01-11 | 38161401 | ND |
| 2018-01-11 | 38161301 | ND |
| 2018-01-11 | 38161201 | ND |
| 2018-04-11 | 39072601 | ND |
| 2018-07-16 | 40207301 | ND |
| 2018-10-17 | 41961701 | ND |
| 2019-01-09 | 42499201 | ND |
| 2019-01-09 | 42499601 | ND |
| 2019-01-09 | 42499501 | ND |
| 2019-01-09 | 42499401 | ND |
| 2019-01-09 | 42499301 | ND |
| 2019-04-01 | 43658101 | ND |
| 2019-07-08 | 45016101 | ND |
| 2019-07-15 | 45716201 | ND |
| 2019-10-07 | 46831501 | ND |
| 2019-10-31 | 43999801 | ND |
| 2020-01-06 | 21542685.00 | ND |
| 2020-01-06 | 21542533.00 | ND |
| 2020-01-06 | 21542643.00 | ND |
| 2020-01-06 | 21542601.00 | ND |
| 2020-01-06 | 21542622.00 | ND |
| 2020-01-06 | 21542554.00 | ND |
| 2020-01-06 | 21542575.00 | ND |
| 2020-01-15 | 21542664.00 | ND |
| 2020-05-06 | 22261490.00 | ND |
| 2020-08-17 | 22843887.00 | ND |
| 2020-10-08 | 23224108.00 | ND |
| 2021-01-14 | 23754056.00 | ND |
| 2021-01-14 | 23754035.00 | ND |
| 2021-01-14 | 23754098.00 | ND |
| 2021-01-14 | 23754077.00 | ND |
| 2021-04-14 | 24290656.00 | ND |
| 2021-04-21 | 24290985.00 | ND |
| 2021-07-01 | 24873768.00 | ND |
| 2021-10-06 | 25448155.00 | ND |
| 2022-01-05 | 25982971.00 | ND |
| 2022-01-05 | 25982893.00 | ND |
| 2022-01-05 | 25982927.00 | ND |
| 2022-01-05 | 25982950.00 | ND |
| 2022-01-05 | 25982874.00 | ND |
| 2022-04-06 | 26506756.00 | ND |
| 2022-07-05 | 27082961.00 | ND |
| 2022-10-06 | 27684628.00 | ND |
| 2023-01-05 | 28212787.00 | ND |
| 2023-01-05 | 28212886.00 | ND |
| 2023-01-05 | 28212865.00 | ND |
| 2023-01-05 | 28212811.00 | ND |
| 2023-01-05 | 28212832.00 | ND |
| 2023-01-05 | 28212774.00 | ND |
| 2023-01-05 | 28212910.00 | ND |
| 2023-04-13 | 28749304.00 | ND |
| 2023-06-07 | 29155729.00 | ND |
| 2023-07-20 | 29346695.00 | ND |
| 2023-10-12 | 29928195.00 | ND |