1,2,4-Trichlorobenzene
Ephrata Area Joint 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 | 5 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 9 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 10 | 0 | ND |
| 2023 | ND | 10 | 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 |
|---|---|---|
| 2018-01-04 | 7020609-01 | ND |
| 2018-01-05 | 8000628-01 | ND |
| 2018-04-09 | 8007939-01 | ND |
| 2018-07-15 | 8020415-01 | ND |
| 2018-10-01 | 8028440-01 | ND |
| 2019-01-02 | 8018023-01 | ND |
| 2019-01-08 | 9000133-01 | ND |
| 2019-04-02 | 7004831-01 | ND |
| 2019-07-02 | 7011943-01 | ND |
| 2019-10-07 | 9035881-01 | ND |
| 2020-01-03 | 21627528.00 | ND |
| 2020-04-06 | 22168747.00 | ND |
| 2020-04-13 | 22168799.00 | ND |
| 2020-04-13 | 22168798.00 | ND |
| 2020-07-13 | 22753750.00 | ND |
| 2020-07-17 | 22753827.00 | ND |
| 2020-07-21 | 22753828.00 | ND |
| 2020-10-07 | 23319883.00 | ND |
| 2020-10-14 | 23319959.00 | ND |
| 2021-02-12 | 24015877.00 | ND |
| 2021-02-26 | 24015901.00 | ND |
| 2021-04-08 | 24201056.00 | ND |
| 2021-04-14 | 24390923.00 | ND |
| 2021-07-01 | 24976234.00 | ND |
| 2021-07-01 | 24976235.00 | ND |
| 2021-07-16 | 24976346.00 | ND |
| 2021-10-05 | 25545655.00 | ND |
| 2021-10-08 | 25545727.00 | ND |
| 2022-01-05 | 26077511.00 | ND |
| 2022-01-31 | 26077711.00 | ND |
| 2022-02-08 | 26247112.00 | ND |
| 2022-04-04 | 26604667.00 | ND |
| 2022-04-05 | 26604699.00 | ND |
| 2022-07-11 | 27188736.00 | ND |
| 2022-07-12 | 27188821.00 | ND |
| 2022-07-22 | 27188980.00 | ND |
| 2022-10-10 | 27782892.00 | ND |
| 2022-10-25 | 27782940.00 | ND |
| 2023-01-09 | 28307552.00 | ND |
| 2023-01-24 | 28307784.00 | ND |
| 2023-01-24 | 28307806.00 | ND |
| 2023-04-14 | 28855568.00 | ND |
| 2023-04-14 | 28855567.00 | ND |
| 2023-07-11 | 29451543.00 | ND |
| 2023-07-18 | 29451602.00 | ND |
| 2023-08-29 | 29654926.00 | ND |
| 2023-10-31 | 30028758.00 | ND |
| 2023-10-31 | 30028757.00 | ND |