1,2,4-Trichlorobenzene
Pennsylvania American Water Company Yardley
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 | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 7 | 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 |
|---|---|---|
| 2018-04-11 | 39062701 | ND |
| 2018-08-14 | 40630801 | ND |
| 2018-08-14 | 40630201 | ND |
| 2019-04-04 | 43649801 | ND |
| 2019-08-22 | 45815901 | ND |
| 2019-08-22 | 45816001 | ND |
| 2020-01-06 | 21487038.00 | ND |
| 2020-04-09 | 22005631.00 | ND |
| 2020-04-09 | 22005610.00 | ND |
| 2020-07-09 | 22591148.00 | ND |
| 2020-08-06 | 22780441.00 | ND |
| 2020-08-06 | 22780462.00 | ND |
| 2020-10-12 | 23166531.00 | ND |
| 2021-01-06 | 23695985.00 | ND |
| 2021-04-06 | 24230995.00 | ND |
| 2021-04-06 | 24230974.00 | ND |
| 2021-07-07 | 24812019.00 | ND |
| 2021-08-02 | 25004503.00 | ND |
| 2021-08-02 | 25004524.00 | ND |
| 2021-10-04 | 25387736.00 | ND |
| 2022-01-03 | 25926365.00 | ND |
| 2022-03-09 | 26272430.00 | ND |
| 2022-04-06 | 26447225.00 | ND |
| 2022-04-06 | 26447250.00 | ND |
| 2022-07-12 | 27020337.00 | ND |
| 2022-08-04 | 27216465.00 | ND |
| 2022-08-04 | 27216418.00 | ND |
| 2022-10-13 | 27625718.00 | ND |
| 2023-01-03 | 28156621.00 | ND |
| 2023-04-17 | 28684433.00 | ND |
| 2023-04-17 | 28684412.00 | ND |
| 2023-07-12 | 29285448.00 | ND |
| 2023-08-09 | 29478516.00 | ND |
| 2023-08-09 | 29478495.00 | ND |
| 2023-10-11 | 29870743.00 | ND |