1,1-Dichloroethylene
City of Napa
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 7 ppb
The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-07-09 | 1233-006-1245 | ND |
2014-07-09 | 1233-007-0925 | ND |
2015-07-21 | 1233-005-1120 | ND |
2015-07-21 | 1233-006-1415 | ND |
2015-07-21 | 1233-007-0940 | ND |
2016-07-27 | 1233-006-1545 | ND |
2016-07-27 | 1233-007-1245 | ND |
2017-07-20 | 1233-006-1330 | ND |
2017-07-20 | 1233-007-1050 | ND |
2017-09-13 | 1233-005-0840 | ND |
2018-07-11 | 1233-006-1015 | ND |
2018-07-11 | 1233-007-1200 | ND |
2019-07-10 | 1233-006-1200 | ND |
2019-07-10 | 1233-007-0830 | ND |