trans-1,2-Dichloroethylene
Fcwwd #41/shaver Lake
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 | 3 | 0 | ND |
| 2021 | ND | 16 | 0 | ND |
| 2022 | ND | 13 | 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 |
|---|---|---|
| 2020-05-06 | CA1010017_047_047-202005061050 | ND |
| 2020-05-06 | CA1010017_049_049-202005061025 | ND |
| 2020-05-06 | CA1010017_048_048-202005060920 | ND |
| 2021-03-08 | CA1010017_009_009-202103081140 | ND |
| 2021-03-08 | CA1010017_001_001-202103081300 | ND |
| 2021-04-05 | CA1010017_004_004-202104051120 | ND |
| 2021-04-05 | CA1010017_008_008-202104051100 | ND |
| 2021-04-05 | CA1010017_006_006-202104050900 | ND |
| 2021-04-06 | CA1010017_011_011-202104061245 | ND |
| 2021-04-06 | CA1010017_012_012-202104061300 | ND |
| 2021-04-06 | CA1010017_042_042-202104061230 | ND |
| 2021-04-12 | CA1010017_015_015-202104121345 | ND |
| 2021-04-12 | CA1010017_014_014-202104121400 | ND |
| 2021-04-13 | CA1010017_034_034-202104131155 | ND |
| 2021-04-13 | CA1010017_062_062-202104131300 | ND |
| 2021-04-14 | CA1010017_005_005-202104141326 | ND |
| 2021-04-14 | CA1010017_033_033-202104141300 | ND |
| 2021-04-19 | CA1010017_036_036-202104191055 | ND |
| 2021-04-19 | CA1010017_035_035-202104191045 | ND |
| 2022-03-02 | CA1010017_065_065-202203021240 | ND |
| 2022-03-02 | CA1010017_059_059-202203021255 | ND |
| 2022-04-06 | CA1010017_043_043-202204061045 | ND |
| 2022-04-06 | CA1010017_040_040-202204061105 | ND |
| 2022-04-06 | CA1010017_037_037-202204061135 | ND |
| 2022-04-06 | CA1010017_044_044-202204061030 | ND |
| 2022-04-12 | CA1010017_056_056-202204121305 | ND |
| 2022-04-12 | CA1010017_057_057-202204121325 | ND |
| 2022-04-12 | CA1010017_058_058-202204121345 | ND |
| 2022-04-19 | CA1010017_038_038-202204191030 | ND |
| 2022-04-19 | CA1010017_046_046-202204191300 | ND |
| 2022-08-03 | CA1010017_066_066-202208031345 | ND |
| 2022-09-07 | CA1010017_041_041-202209071350 | ND |
| 2023-04-24 | CA1010017_002_002-202304241100 | ND |