trans-1,2-Dichloroethylene
Golden State Water Company (GSWC) - Florence/Graham
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 | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 6 | 0 | ND |
2018 | ND | 6 | 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 |
---|---|---|
2014-02-06 | 2706-010-1048 | ND |
2015-02-05 | 2706-010-1148 | ND |
2016-02-04 | 4790-010-1030 | ND |
2016-05-04 | 2706-027-0948 | ND |
2016-05-04 | 2706-036-0900 | ND |
2016-05-04 | 2706-034-1110 | ND |
2016-05-04 | 2706-033-1105 | ND |
2017-02-08 | 9590-010-1303 | ND |
2017-02-08 | 9590-027-1250 | ND |
2017-03-06 | 9590-033-0927 | ND |
2017-03-06 | 9590-034-0928 | ND |
2017-03-07 | 9590-027-1205 | ND |
2017-03-07 | 9590-036-1056 | ND |
2018-01-03 | 9590-036-1202 | ND |
2018-02-12 | 9590-010-0858 | ND |
2018-03-06 | 9590-033-1111 | ND |
2018-03-06 | 9590-036-1259 | ND |
2018-03-06 | 9590-034-1114 | ND |
2018-03-07 | 9590-027-1128 | ND |
2019-02-13 | 9590-033-1018 | ND |
2019-02-13 | 9590-034-1018 | ND |
2019-02-13 | 9590-027-1038 | ND |
2019-02-13 | 9590-010-1040 | ND |