1,1-Dichloroethylene
N Walpole Village District/low
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
44
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 |
|---|---|---|---|---|
| 2014 | 0.900 ppb | 8 | 5 | ND - 2.00 ppb |
| 2015 | 1.59 ppb | 8 | 8 | 0.800 ppb - 2.40 ppb |
| 2016 | 1.34 ppb | 8 | 8 | 0.600 ppb - 2.10 ppb |
| 2017 | 0.464 ppb | 8 | 3 | ND - 1.30 ppb |
| 2018 | 1.19 ppb | 9 | 8 | ND - 1.90 ppb |
| 2019 | 1.57 ppb | 3 | 3 | 1.30 ppb - 1.90 ppb |
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 |
|---|---|---|
| 2014-01-07 | 3401-214 | 1.90 ppb |
| 2014-01-07 | 3401-215 | 0.800 ppb |
| 2014-04-08 | 3404-628 | ND |
| 2014-04-08 | 3404-627 | 1.40 ppb |
| 2014-07-08 | 3407-566 | ND |
| 2014-07-08 | 3407-565 | ND |
| 2014-10-07 | 3410-509 | 2.00 ppb |
| 2014-10-07 | 3410-513 | 1.10 ppb |
| 2015-03-09 | 3503-718 | 2.10 ppb |
| 2015-03-10 | 3503-719 | 1.10 ppb |
| 2015-06-02 | 3506-294 | 0.800 ppb |
| 2015-06-02 | 3506-293 | 1.70 ppb |
| 2015-08-04 | 3508-356-1 | 2.40 ppb |
| 2015-08-04 | 3508-357-1 | 1.10 ppb |
| 2015-10-06 | 3510-592-1 | 2.20 ppb |
| 2015-10-06 | 3510-595-1 | 1.30 ppb |
| 2016-03-01 | 3603-128-1 | 0.600 ppb |
| 2016-03-01 | 3603-129-1 | 1.40 ppb |
| 2016-04-12 | 3604-1362-1 | 1.20 ppb |
| 2016-04-12 | 3604-1363-1 | 2.00 ppb |
| 2016-07-12 | 3607-1113-1 | 2.10 ppb |
| 2016-07-12 | 3607-1114-1 | 0.700 ppb |
| 2016-10-18 | 3610-1624-1 | 1.59 ppb |
| 2016-10-18 | 3610-1627-1 | 1.09 ppb |
| 2017-02-07 | 3702-549-1 | ND |
| 2017-02-07 | 3702-550-1 | ND |
| 2017-04-04 | 3704-289-1 | ND |
| 2017-06-06 | 3706-570-1 | 1.24 ppb |
| 2017-07-11 | 3707-901-1 | 1.17 ppb |
| 2017-07-11 | 3707-903-1 | ND |
| 2017-10-09 | 117100984 | 1.30 ppb |
| 2017-10-10 | 117100986 | ND |
| 2018-01-09 | 118010501.01 | 1.000 ppb |
| 2018-03-06 | 118030514.01 | 1.50 ppb |
| 2018-04-11 | 118041218.01 | 1.40 ppb |
| 2018-05-08 | 118051007.01 | 0.850 ppb |
| 2018-07-10 | 118070915.01 | 1.90 ppb |
| 2018-07-10 | 118070915.02 | ND |
| 2018-09-05 | 118090432.01 | 1.50 ppb |
| 2018-11-05 | 118110574.01 | 1.50 ppb |
| 2018-11-06 | 118110570.01 | 1.10 ppb |
| 2019-03-04 | 119030357.01 | 1.90 ppb |
| 2019-03-05 | 119030358.01 | 1.30 ppb |
| 2019-04-02 | 119040308.01 | 1.50 ppb |