trans-1,2-Dichloroethylene
City Of Waterford
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 | 4 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-07-18 | CA5010006_001_001-201807181240 | ND |
| 2018-07-18 | CA5010006_004_004-201807181140 | ND |
| 2018-07-18 | CA5010006_006_006-201807181313 | ND |
| 2018-07-18 | CA5010006_005_005-201807181045 | ND |
| 2021-07-20 | CA5010006_001_001-202107201250 | ND |
| 2021-07-20 | CA5010006_004_004-202107201140 | ND |
| 2021-07-20 | CA5010006_005_005-202107201110 | ND |
| 2021-07-20 | CA5010006_006_006-202107201315 | ND |
| 2022-12-01 | CA5010006_005_005-202212010940 | ND |
| 2022-12-01 | CA5010006_001_001-202212011145 | ND |
| 2023-05-17 | CA5010006_002_002-202305171210 | ND |