1,2,4-Trichlorobenzene
Horsham Water&sewer 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 | 8 | 0 | ND |
| 2019 | ND | 13 | 0 | ND |
| 2020 | ND | 23 | 0 | ND |
| 2021 | ND | 18 | 0 | ND |
| 2022 | 0.0333 ppb | 18 | 1 | ND - 0.600 ppb |
| 2023 | 0.0467 ppb | 15 | 1 | ND - 0.700 ppb |
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 |
|---|---|---|
| 2018-01-30 | AF74813 | ND |
| 2018-01-30 | AF74814 | ND |
| 2018-02-13 | AF75932 | ND |
| 2018-03-23 | AF79016 | ND |
| 2018-06-22 | AF86999 | ND |
| 2018-08-30 | AF94269 | ND |
| 2018-10-03 | AF96985 | ND |
| 2018-12-27 | AG04620 | ND |
| 2019-02-11 | AG07773 | ND |
| 2019-02-11 | AG07771 | ND |
| 2019-02-11 | AG07775 | ND |
| 2019-02-11 | AG07772 | ND |
| 2019-02-27 | AG09179 | ND |
| 2019-04-11 | AG13046 | ND |
| 2019-04-11 | AG13047 | ND |
| 2019-05-09 | AG16016 | ND |
| 2019-05-09 | AG16019 | ND |
| 2019-05-23 | AG16891 | ND |
| 2019-08-21 | AG28299 | ND |
| 2019-09-18 | AG31925 | ND |
| 2019-09-18 | AG31924 | ND |
| 2020-01-16 | 21502653.00 | ND |
| 2020-01-16 | 21502632.00 | ND |
| 2020-01-16 | 21502611.00 | ND |
| 2020-01-16 | 21502590.00 | ND |
| 2020-03-12 | 21846176.00 | ND |
| 2020-03-12 | 21846155.00 | ND |
| 2020-03-12 | 21846134.00 | ND |
| 2020-03-12 | 21846113.00 | ND |
| 2020-03-12 | 21846092.00 | ND |
| 2020-04-08 | 22021654.00 | ND |
| 2020-04-08 | 22021612.00 | ND |
| 2020-04-08 | 22021591.00 | ND |
| 2020-04-08 | 22021633.00 | ND |
| 2020-05-20 | 22214496.00 | ND |
| 2020-05-20 | 22214475.00 | ND |
| 2020-07-22 | 22607030.00 | ND |
| 2020-07-22 | 22607009.00 | ND |
| 2020-07-22 | 22607051.00 | ND |
| 2020-07-22 | 22606988.00 | ND |
| 2020-10-21 | 23181837.00 | ND |
| 2020-10-21 | 23181816.00 | ND |
| 2020-10-21 | 23181774.00 | ND |
| 2020-10-21 | 23181795.00 | ND |
| 2021-01-06 | 23888194.00 | ND |
| 2021-01-06 | 23888173.00 | ND |
| 2021-01-06 | 23888131.00 | ND |
| 2021-01-06 | 23888152.00 | ND |
| 2021-05-13 | 24438516.00 | ND |
| 2021-05-13 | 24438495.00 | ND |
| 2021-05-13 | 24438474.00 | ND |
| 2021-05-13 | 24438453.00 | ND |
| 2021-07-08 | 24828059.00 | ND |
| 2021-07-21 | 24828164.00 | ND |
| 2021-07-21 | 24828227.00 | ND |
| 2021-07-21 | 24828206.00 | ND |
| 2021-07-21 | 24828185.00 | ND |
| 2021-07-29 | 25022377.00 | ND |
| 2021-09-29 | 25220222.00 | ND |
| 2021-10-07 | 25403882.00 | ND |
| 2021-10-13 | 25403917.00 | ND |
| 2021-10-27 | 25403927.00 | ND |
| 2022-01-05 | 26117082.00 | ND |
| 2022-01-12 | 26117040.00 | ND |
| 2022-01-12 | 26117061.00 | ND |
| 2022-02-10 | 26117139.00 | ND |
| 2022-02-17 | 26117103.00 | ND |
| 2022-02-24 | 26117116.00 | ND |
| 2022-04-06 | 26463496.00 | ND |
| 2022-04-20 | 26463538.00 | ND |
| 2022-04-20 | 26463559.00 | ND |
| 2022-04-20 | 26463517.00 | ND |
| 2022-07-07 | 27037092.00 | ND |
| 2022-07-13 | 27037071.00 | ND |
| 2022-07-13 | 27037050.00 | ND |
| 2022-07-14 | 27037029.00 | ND |
| 2022-11-02 | 27822983.00 | 0.600 ppb |
| 2022-11-09 | 27822920.00 | ND |
| 2022-11-10 | 27822941.00 | ND |
| 2022-11-10 | 27822962.00 | ND |
| 2023-01-18 | 28172694.00 | ND |
| 2023-01-19 | 28172673.00 | ND |
| 2023-01-26 | 28172715.00 | ND |
| 2023-01-26 | 28172736.00 | ND |
| 2023-04-12 | 28702125.00 | ND |
| 2023-04-26 | 28702167.00 | ND |
| 2023-04-26 | 28702188.00 | 0.700 ppb |
| 2023-04-26 | 28702104.00 | ND |
| 2023-04-26 | 28702146.00 | ND |
| 2023-07-27 | 29301880.00 | ND |
| 2023-07-27 | 29301859.00 | ND |
| 2023-07-27 | 29301901.00 | ND |
| 2023-10-19 | 29886659.00 | ND |
| 2023-10-19 | 29886638.00 | ND |
| 2023-10-19 | 29886617.00 | ND |