cis-1,2-Dichloroethylene
Bourne 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 | 1.31 ppb | 1 | 1 | 1.31 ppb |
2015 | 0.345 ppb | 8 | 1 | ND - 2.76 ppb |
2016 | 1.08 ppb | 9 | 4 | ND - 2.77 ppb |
2017 | 1.19 ppb | 11 | 5 | ND - 3.56 ppb |
2018 | 0.647 ppb | 10 | 4 | ND - 2.03 ppb |
2019 | 0.610 ppb | 10 | 4 | ND - 1.83 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 | Result |
---|---|
2014-04-09 | 1.31 ppb |
2015-08-10 | 2.76 ppb |
2015-10-13 | ND |
2015-10-13 | ND |
2015-10-13 | ND |
2015-10-13 | ND |
2015-10-13 | ND |
2015-10-13 | ND |
2015-10-13 | ND |
2016-01-22 | 2.30 ppb |
2016-04-13 | 2.24 ppb |
2016-07-19 | 2.40 ppb |
2016-11-10 | ND |
2016-11-10 | 2.77 ppb |
2016-11-10 | ND |
2016-11-10 | ND |
2016-11-10 | ND |
2016-11-10 | ND |
2017-01-25 | 2.56 ppb |
2017-01-25 | 3.56 ppb |
2017-04-25 | 2.89 ppb |
2017-07-26 | 2.09 ppb |
2017-10-03 | ND |
2017-10-03 | ND |
2017-10-03 | 2.01 ppb |
2017-10-03 | ND |
2017-10-03 | ND |
2017-10-03 | ND |
2017-10-03 | ND |
2018-01-10 | 2.03 ppb |
2018-04-09 | 1.35 ppb |
2018-07-12 | 1.74 ppb |
2018-10-22 | ND |
2018-10-22 | ND |
2018-10-22 | ND |
2018-10-22 | 1.35 ppb |
2018-10-22 | ND |
2018-10-22 | ND |
2018-10-22 | ND |
2019-01-23 | 1.26 ppb |
2019-05-08 | 1.48 ppb |
2019-07-26 | 1.53 ppb |
2019-11-19 | ND |
2019-11-19 | ND |
2019-11-19 | 1.83 ppb |
2019-11-19 | ND |
2019-11-19 | ND |
2019-11-19 | ND |
2019-11-19 | ND |