trans-1,2-Dichloroethylene
Andrews Water Department
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 12 | 0 | ND |
| 2022 | ND | 16 | 0 | ND |
| 2023 | ND | 9 | 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 |
|---|---|---|
| 2020-06-22 | DK35115 | ND |
| 2020-06-27 | 50261040001 | ND |
| 2020-07-23 | 20072479-001 | ND |
| 2020-09-10 | 20091027-002 | ND |
| 2020-11-23 | 20112107-002AREV2 | ND |
| 2021-02-10 | 21021011-001A | ND |
| 2021-05-10 | 21050821-001A | ND |
| 2021-07-20 | 21071758-001A | ND |
| 2021-08-18 | 21081685-001A | ND |
| 2021-08-20 | 21082037-002A | ND |
| 2021-08-20 | 21082037-003A | ND |
| 2021-08-20 | 21082037-004A | ND |
| 2021-08-20 | 21082037-001A | ND |
| 2021-11-22 | 21112028-002A | ND |
| 2021-11-22 | 21112028-001A | ND |
| 2021-12-02 | 21120159-001A | ND |
| 2021-12-02 | 21120159-002A | ND |
| 2022-01-26 | 22011891-001A | ND |
| 2022-01-26 | 22011891-002A | ND |
| 2022-02-15 | 22020997-004A | ND |
| 2022-02-15 | 22020997-003A | ND |
| 2022-05-23 | 112708-2 | ND |
| 2022-05-23 | 112708-1 | ND |
| 2022-08-16 | 122459-1 | ND |
| 2022-08-16 | 122459-2 | ND |
| 2022-11-17 | 132023-1 | ND |
| 2022-11-29 | 132892-1 | ND |
| 2022-11-29 | 132892-3 | ND |
| 2022-11-29 | 132892-2 | ND |
| 2022-12-02 | 133268-2 | ND |
| 2022-12-02 | 133268-1 | ND |
| 2022-12-08 | 133928-2 | ND |
| 2022-12-08 | 133928-1 | ND |
| 2023-01-24 | 138157-1 | ND |
| 2023-01-24 | 138157-2 | ND |
| 2023-05-08 | 148546-1 | ND |
| 2023-05-08 | 148546-2 | ND |
| 2023-08-23 | 160623-2 | ND |
| 2023-08-23 | 160623-4 | ND |
| 2023-08-23 | 160623-5 | ND |
| 2023-11-21 | 169747-1 | ND |
| 2023-11-21 | 169747-2 | ND |