1,1-Dichloroethylene
Butte-Silver Bow Water Department
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
18
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-02-24 | B14021519-003E | ND |
| 2014-02-24 | B14021519-002E | ND |
| 2014-02-24 | B14021519-001E | ND |
| 2015-02-24 | B15021845-003C | ND |
| 2015-02-24 | B15021845-002C | ND |
| 2015-02-24 | B15021845-001C | ND |
| 2016-02-22 | B16021667-001C | ND |
| 2016-02-22 | B16021667-003C | ND |
| 2016-02-22 | B16021667-002C | ND |
| 2017-06-20 | B17061971-003E | ND |
| 2017-06-20 | B17061971-002E | ND |
| 2017-06-20 | B17061971-001E | ND |
| 2018-03-13 | B18031136-003C | ND |
| 2018-03-13 | B18031136-002C | ND |
| 2018-03-13 | B18031136-001C | ND |
| 2019-03-25 | B19032022-001C | ND |
| 2019-03-25 | B19032022-003C | ND |
| 2019-03-25 | B19032022-002C | ND |