1,1-Dichloroethylene
City of Taneytown
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
38
Samples
1
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.662 ppb | 13 | 4 | ND - 2.79 ppb |
| 2019 | 0.606 ppb | 12 | 3 | ND - 3.60 ppb |
| 2020 | 0.696 ppb | 5 | 2 | ND - 2.20 ppb |
| 2021 | 4.87 ppb | 2 | 2 | 1.85 ppb - 7.89 ppb |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 0.487 ppb | 6 | 2 | ND - 1.95 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-03-05 | 2300211001 | 2.60 ppb |
| 2018-03-13 | E18003311004 | ND |
| 2018-06-20 | E18004567001 | ND |
| 2018-06-26 | 2322947001 | ND |
| 2018-07-10 | 2325449001 | 2.20 ppb |
| 2018-07-10 | 2325449002 | ND |
| 2018-08-16 | E19000551001 | ND |
| 2018-08-16 | E19000551004 | ND |
| 2018-08-16 | E19000551006 | 2.79 ppb |
| 2018-08-16 | E19000551008 | 1.02 ppb |
| 2018-08-20 | 2333891001 | ND |
| 2018-10-24 | E19001379001 | ND |
| 2018-11-06 | 2349403001 | ND |
| 2019-03-19 | 3022708001 | ND |
| 2019-06-03 | 3037434001 | ND |
| 2019-06-13 | E19004289004 | ND |
| 2019-07-15 | 3045714001 | 3.60 ppb |
| 2019-07-15 | 3045712001 | ND |
| 2019-07-25 | E20000354012 | ND |
| 2019-07-25 | E20000354008 | 0.930 ppb |
| 2019-07-25 | E20000354006 | 2.74 ppb |
| 2019-07-25 | E20000354004 | ND |
| 2019-07-25 | E20000354001 | ND |
| 2019-07-25 | E20000354010 | ND |
| 2019-11-05 | 3068008001 | ND |
| 2020-02-18 | 3087316001 | ND |
| 2020-03-03 | E20002984006 | ND |
| 2020-09-16 | E21000751006 | ND |
| 2020-09-16 | E21000751004 | 1.28 ppb |
| 2020-09-16 | E21000751001 | 2.20 ppb |
| 2021-03-15 | E21002483001 | 1.85 ppb |
| 2021-03-15 | E21002483004 | 7.89 ppb |
| 2023-03-21 | E2300223601 | 0.970 ppb |
| 2023-03-21 | E2300223701 | 1.95 ppb |
| 2023-05-23 | E2300281402 | ND |
| 2023-05-23 | E2300281404 | ND |
| 2023-05-23 | E2300281406 | ND |
| 2023-05-23 | E2300281408 | ND |