trans-1,2-Dichloroethylene
Newberry System
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 | 7 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 9 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 7 | 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 |
|---|---|---|
| 2018-02-13 | 2294974001 | ND |
| 2018-02-13 | 2294974008 | ND |
| 2018-02-13 | 2294974004 | ND |
| 2018-02-13 | 2294974002 | ND |
| 2018-05-16 | 1811900-01 | ND |
| 2018-07-12 | 1818847-01 | ND |
| 2018-11-08 | 2348797001 | ND |
| 2019-01-24 | H9A0846-02 | ND |
| 2019-01-24 | H9A0846-03 | ND |
| 2019-01-24 | H9A0846-05 | ND |
| 2019-01-24 | H9A0846-01 | ND |
| 2019-04-03 | H9D0597-01 | ND |
| 2019-09-11 | H9I0706-02 | ND |
| 2019-11-13 | H9K0598-01 | ND |
| 2020-02-06 | 21815994.00 | ND |
| 2020-02-06 | 21815958.00 | ND |
| 2020-02-06 | 21816005.00 | ND |
| 2020-02-06 | 21816067.00 | ND |
| 2020-02-06 | 21816044.00 | ND |
| 2020-02-06 | 21816027.00 | ND |
| 2020-05-19 | 22383274.00 | ND |
| 2020-08-13 | 22969935.00 | ND |
| 2020-11-18 | 23509519.00 | ND |
| 2021-01-14 | 23861831.00 | ND |
| 2021-01-14 | 23861878.00 | ND |
| 2021-01-14 | 23861911.00 | ND |
| 2021-01-28 | 23862384.00 | ND |
| 2021-05-13 | 24609096.00 | ND |
| 2021-08-12 | 25191881.00 | ND |
| 2021-11-16 | 25738691.00 | ND |
| 2022-02-08 | 26262328.00 | ND |
| 2022-02-08 | 26262349.00 | ND |
| 2022-02-08 | 26262393.00 | ND |
| 2022-02-08 | 26262307.00 | ND |
| 2022-05-17 | 26815287.00 | ND |
| 2022-08-16 | 27412282.00 | ND |
| 2022-11-21 | 27973152.00 | ND |
| 2023-02-23 | 28494975.00 | ND |
| 2023-02-23 | 28494908.00 | ND |
| 2023-02-23 | 28494996.00 | ND |
| 2023-02-23 | 28494952.00 | ND |
| 2023-02-23 | 28494929.00 | ND |
| 2023-02-23 | 28495017.00 | ND |
| 2023-05-15 | 29074210.00 | ND |
| 2023-07-13 | 29467626.00 | ND |
| 2023-11-07 | 30220805.00 | ND |