cis-1,2-Dichloroethylene
El Monte Water Department
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 | 2 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | 0.315 ppb | 6 | 2 | ND - 1.10 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for cis-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 |
---|---|---|
2014-01-28 | 9588-006-1035 | ND |
2014-07-28 | 9588-009-1030 | ND |
2015-01-13 | 9588-006-1015 | ND |
2016-01-11 | 9588-006-1045 | ND |
2016-07-07 | 9588-009-0950 | ND |
2017-01-30 | 9588-006-1350 | ND |
2017-08-03 | 9588-009-0945 | ND |
2018-01-25 | 9588-006-1130 | ND |
2018-07-25 | 9588-009-1300 | ND |
2019-01-31 | 9588-006-1050 | ND |
2019-05-28 | 9588-043-1310 | 0.790 ppb |
2019-05-28 | 9588-044-1240 | ND |
2019-05-28 | 9588-045-1255 | ND |
2019-07-25 | 9588-009-1430 | ND |
2019-12-03 | 9588-043-1345 | 1.10 ppb |