1,1-Dichloroethylene
Doylestown Borough Water Department
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
30
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 | 0.420 ppb | 5 | 1 | ND - 2.10 ppb |
| 2015 | 0.760 ppb | 5 | 1 | ND - 3.80 ppb |
| 2016 | 0.580 ppb | 5 | 1 | ND - 2.90 ppb |
| 2017 | 1.06 ppb | 5 | 2 | ND - 4.00 ppb |
| 2018 | 0.860 ppb | 5 | 1 | ND - 4.30 ppb |
| 2019 | 0.280 ppb | 5 | 1 | ND - 1.40 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 |
|---|---|---|
| 2014-01-22 | L4867559-1 | ND |
| 2014-01-22 | L4867559-2 | 2.10 ppb |
| 2014-02-25 | L4899027-2 | ND |
| 2014-02-25 | L4899027-3 | ND |
| 2014-02-25 | L4899027-1 | ND |
| 2015-01-13 | 12274553 | ND |
| 2015-01-13 | 12274607 | 3.80 ppb |
| 2015-02-03 | 12389836 | ND |
| 2015-02-03 | 12389890 | ND |
| 2015-02-03 | 12389944 | ND |
| 2016-02-05 | 13858693 | ND |
| 2016-02-05 | 13858747 | ND |
| 2016-02-05 | 13858585 | 2.90 ppb |
| 2016-02-05 | 13858639 | ND |
| 2016-02-05 | 13858531 | ND |
| 2017-01-06 | 15503082 | ND |
| 2017-01-06 | 15502924 | ND |
| 2017-01-06 | 15502976 | 4.00 ppb |
| 2017-01-06 | 15503134 | 1.30 ppb |
| 2017-01-06 | 15503030 | ND |
| 2018-01-12 | L6983060-3 | ND |
| 2018-01-12 | L6983058-2 | 4.30 ppb |
| 2018-01-12 | L6983060-2 | ND |
| 2018-01-12 | L6983058-1 | ND |
| 2018-01-12 | L6983060-1 | ND |
| 2019-01-31 | L7090358-2 | ND |
| 2019-01-31 | L7090359-1 | ND |
| 2019-01-31 | L7090359-2 | 1.40 ppb |
| 2019-01-31 | L7090358-3 | ND |
| 2019-01-31 | L7090358-1 | ND |