trans-1,2-Dichloroethylene
Swan Lake Resort
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 | 0.382 ppb | 5 | 2 | ND - 1.40 ppb |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | 0.130 ppb | 9 | 2 | ND - 0.670 ppb |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2018-02-12 | 2295566001 | 0.510 ppb |
| 2018-04-02 | 7048424001-VOC | 1.40 ppb |
| 2018-08-20 | 7062719001-VOC | ND |
| 2018-08-20 | 7062720001-VOC | ND |
| 2018-10-01 | 7067151001-VOC | ND |
| 2019-01-23 | 7077588001-VOC | ND |
| 2019-06-12 | 7093684001-VOC | ND |
| 2019-06-25 | 7095249001-VOC | ND |
| 2019-08-22 | 70102615001-VOC | ND |
| 2019-10-29 | 70110273001-VOC | ND |
| 2020-01-29 | P20-00625-01 | ND |
| 2020-06-02 | 70132984001-VOC | ND |
| 2020-09-10 | 70145551001-VOC | ND |
| 2020-09-10 | 70145552001-VOC | ND |
| 2020-11-12 | 70153541001-VOC | ND |
| 2021-02-01 | P21-00714-01VOC | ND |
| 2021-02-01 | P21-00715-01VOC | 0.500 ppb |
| 2021-04-20 | P21-03124-01 | ND |
| 2021-04-20 | P21-03125-01 | ND |
| 2021-07-29 | P21-08019-01 | 0.670 ppb |
| 2021-07-29 | P21-08020-01 | ND |
| 2021-10-05 | P21-11215-01 | ND |
| 2021-10-05 | P21-11214-01 | ND |
| 2021-10-07 | P21-11250-01 | ND |
| 2022-01-20 | P22-00602-01 | ND |
| 2022-01-20 | P22-00601-01 | ND |
| 2022-04-12 | 220412009-04 | ND |
| 2022-04-12 | 220412009-06 | ND |
| 2022-08-09 | 220809011-15 | ND |
| 2022-08-09 | 220809011-08 | ND |
| 2022-10-04 | 221004026-05 | ND |
| 2022-10-11 | 221011046-06 | ND |
| 2023-01-04 | 230104049-06 | ND |
| 2023-01-17 | 230117046-06 | ND |
| 2023-05-25 | 230504079-05 | ND |
| 2023-05-25 | 230504079-06 | ND |
| 2023-07-12 | 230712045-08 | ND |
| 2023-07-12 | 230712045-15 | ND |
| 2023-10-05 | 231005077-07 | ND |
| 2023-10-05 | 231005077-13 | ND |