cis-1,2-Dichloroethylene
Linda County Water District
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 5 | 0 | ND |
2017 | 1.27 ppb | 6 | 2 | ND - 5.70 ppb |
2018 | N/A | 0 | 0 | N/A |
2019 | 0.900 ppb | 2 | 1 | ND - 1.80 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 |
---|---|---|
2016-06-22 | 3334-001-0803 | ND |
2016-06-22 | 3334-002-0810 | ND |
2016-06-22 | 3334-007-0930 | ND |
2016-06-22 | 3334-009-0920 | ND |
2016-06-22 | 3334-011-0900 | ND |
2017-08-09 | 3334-001-1030 | 1.90 ppb |
2017-08-09 | 3334-002-1044 | ND |
2017-08-09 | 3334-007-1155 | 5.70 ppb |
2017-08-09 | 3334-009-1145 | ND |
2017-08-09 | 3334-011-1110 | ND |
2017-08-09 | 3334-015-1110 | ND |
2019-09-25 | 3334-001-1025 | 1.80 ppb |
2019-09-25 | 3334-002-1025 | ND |