1,2,4-Trichlorobenzene
Altoona Water Authority
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 | 6 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-08-28 | 8H28046-01 | ND |
| 2018-08-28 | 8H28044-01 | ND |
| 2018-08-28 | 8H28051-01 | ND |
| 2018-08-28 | 8H28032-01 | ND |
| 2018-08-28 | 8H28031-01 | ND |
| 2018-08-28 | 8H28047-01 | ND |
| 2019-11-06 | 9K07058-01 | ND |
| 2019-11-06 | 9K07058-03 | ND |
| 2019-11-07 | 9K07074-01 | ND |
| 2019-11-07 | 9K07072-01 | ND |
| 2019-12-05 | 9L05126-01 | ND |
| 2020-02-06 | 21729168.00 | ND |
| 2020-08-05 | 22869683.00 | ND |
| 2020-08-05 | 22869682.00 | ND |
| 2020-08-05 | 22869681.00 | ND |
| 2020-08-10 | 22869894.00 | ND |
| 2020-08-10 | 22869895.00 | ND |
| 2020-08-10 | 22869893.00 | ND |
| 2021-07-01 | 24897497.00 | ND |
| 2021-07-08 | 24897518.00 | ND |
| 2021-08-10 | 25092067.00 | ND |
| 2021-08-10 | 25092003.00 | ND |
| 2021-08-10 | 25092066.00 | ND |
| 2021-08-10 | 25092004.00 | ND |
| 2021-08-10 | 25092005.00 | ND |
| 2021-12-13 | 25828694.00 | ND |
| 2022-02-24 | 26177231.00 | ND |
| 2022-08-16 | 27309593.00 | ND |
| 2022-08-16 | 27309669.00 | ND |
| 2022-08-16 | 27308834.00 | ND |
| 2022-08-16 | 27309635.00 | ND |
| 2022-11-10 | 27885516.00 | ND |
| 2023-07-26 | 29371562.00 | ND |
| 2023-07-26 | 29371519.00 | ND |
| 2023-07-26 | 29371475.00 | ND |
| 2023-07-26 | 29371541.00 | ND |
| 2023-07-26 | 29371497.00 | ND |