trans-1,2-Dichloroethylene
California Water Service Co-lake Hughes
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 3 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
---|---|---|
2014-10-07 | 5701-001-1335 | ND |
2014-11-04 | 5701-008-1457 | ND |
2014-12-22 | 9590-005-1208 | ND |
2015-07-21 | 5701-001-1551 | ND |
2015-07-21 | 5701-005-1534 | ND |
2015-10-20 | 5701-008-1100 | ND |
2016-07-19 | 5701-001-1420 | ND |
2016-07-19 | 5701-005-1351 | ND |
2016-10-18 | 5701-008-1140 | ND |
2017-04-11 | 5701-008-1320 | ND |
2017-07-27 | 5701-005-1327 | ND |
2017-07-27 | 5701-001-1349 | ND |
2018-04-17 | 9590-008-1355 | ND |
2018-07-17 | 5701-005-0949 | ND |
2018-07-17 | 5701-001-1420 | ND |
2019-04-16 | 5701-008-1130 | ND |
2019-07-22 | 5701-005-1502 | ND |
2019-07-23 | 5701-001-1425 | ND |
2019-10-15 | 5701-008-1035 | ND |