trans-1,2-Dichloroethylene
Myrtle Springs Water Supply Corporation
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 | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-06-28 | Q1825924020 | ND |
| 2018-06-28 | Q1825924022 | ND |
| 2018-06-28 | Q1825924017 | ND |
| 2019-08-26 | Q1959383002 | ND |
| 2019-08-26 | Q1959383004 | ND |
| 2019-08-26 | Q1959383006 | ND |
| 2020-03-23 | Q2012172009 | ND |
| 2020-05-21 | Q2020401006 | ND |
| 2020-08-12 | Q2032124004 | ND |
| 2020-08-12 | Q2032124006 | ND |
| 2020-08-12 | Q2032124008 | ND |
| 2020-08-12 | Q2032124019 | ND |
| 2020-11-20 | Q2046941001 | ND |
| 2021-06-29 | Q2116915007 | ND |
| 2021-06-29 | Q2116915013 | ND |
| 2021-06-29 | Q2116915011 | ND |
| 2021-06-29 | Q2116915009 | ND |
| 2022-06-09 | Q2216228001 | ND |
| 2022-06-09 | Q2216228003 | ND |
| 2022-06-09 | Q2216228005 | ND |
| 2022-06-09 | Q2216228007 | ND |
| 2023-04-19 | Q2314546005 | ND |
| 2023-04-19 | Q2314546007 | ND |
| 2023-04-19 | Q2314546009 | ND |
| 2023-04-19 | Q2314546011 | ND |
| 2023-09-06 | Q2338438003 | ND |
| 2023-12-06 | Q2352167001 | ND |