trans-1,2-Dichloroethylene
Horsham Water&sewer Authority
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
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 | ND | 18 | 0 | ND |
| 2023 | ND | 15 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene 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 harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for trans-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
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 | 21502661.00 | ND |
| 2020-01-16 | 21502640.00 | ND |
| 2020-01-16 | 21502619.00 | ND |
| 2020-01-16 | 21502598.00 | ND |
| 2020-03-12 | 21846184.00 | ND |
| 2020-03-12 | 21846163.00 | ND |
| 2020-03-12 | 21846142.00 | ND |
| 2020-03-12 | 21846121.00 | ND |
| 2020-03-12 | 21846100.00 | ND |
| 2020-04-08 | 22021662.00 | ND |
| 2020-04-08 | 22021620.00 | ND |
| 2020-04-08 | 22021599.00 | ND |
| 2020-04-08 | 22021641.00 | ND |
| 2020-05-20 | 22214504.00 | ND |
| 2020-05-20 | 22214483.00 | ND |
| 2020-07-22 | 22607038.00 | ND |
| 2020-07-22 | 22607017.00 | ND |
| 2020-07-22 | 22607059.00 | ND |
| 2020-07-22 | 22606996.00 | ND |
| 2020-10-21 | 23181845.00 | ND |
| 2020-10-21 | 23181824.00 | ND |
| 2020-10-21 | 23181782.00 | ND |
| 2020-10-21 | 23181803.00 | ND |
| 2021-01-06 | 23888202.00 | ND |
| 2021-01-06 | 23888181.00 | ND |
| 2021-01-06 | 23888139.00 | ND |
| 2021-01-06 | 23888160.00 | ND |
| 2021-05-13 | 24438525.00 | ND |
| 2021-05-13 | 24438504.00 | ND |
| 2021-05-13 | 24438483.00 | ND |
| 2021-05-13 | 24438462.00 | ND |
| 2021-07-08 | 24828067.00 | ND |
| 2021-07-21 | 24828172.00 | ND |
| 2021-07-21 | 24828235.00 | ND |
| 2021-07-21 | 24828214.00 | ND |
| 2021-07-21 | 24828193.00 | ND |
| 2021-07-29 | 25022385.00 | ND |
| 2021-09-29 | 25220230.00 | ND |
| 2021-10-07 | 25403890.00 | ND |
| 2021-10-13 | 25403905.00 | ND |
| 2021-10-27 | 25403935.00 | ND |
| 2022-01-05 | 26117090.00 | ND |
| 2022-01-12 | 26117048.00 | ND |
| 2022-01-12 | 26117069.00 | ND |
| 2022-02-10 | 26117147.00 | ND |
| 2022-02-17 | 26117027.00 | ND |
| 2022-02-24 | 26117124.00 | ND |
| 2022-04-06 | 26463504.00 | ND |
| 2022-04-20 | 26463546.00 | ND |
| 2022-04-20 | 26463567.00 | ND |
| 2022-04-20 | 26463525.00 | ND |
| 2022-07-07 | 27037100.00 | ND |
| 2022-07-13 | 27037079.00 | ND |
| 2022-07-13 | 27037058.00 | ND |
| 2022-07-14 | 27037037.00 | ND |
| 2022-11-02 | 27822991.00 | ND |
| 2022-11-09 | 27822928.00 | ND |
| 2022-11-10 | 27822949.00 | ND |
| 2022-11-10 | 27822970.00 | ND |
| 2023-01-18 | 28172702.00 | ND |
| 2023-01-19 | 28172681.00 | ND |
| 2023-01-26 | 28172723.00 | ND |
| 2023-01-26 | 28172744.00 | ND |
| 2023-04-12 | 28702133.00 | ND |
| 2023-04-26 | 28702175.00 | ND |
| 2023-04-26 | 28702196.00 | ND |
| 2023-04-26 | 28702112.00 | ND |
| 2023-04-26 | 28702154.00 | ND |
| 2023-07-27 | 29301888.00 | ND |
| 2023-07-27 | 29301867.00 | ND |
| 2023-07-27 | 29301909.00 | ND |
| 2023-10-19 | 29886667.00 | ND |
| 2023-10-19 | 29886646.00 | ND |
| 2023-10-19 | 29886625.00 | ND |