1,1-Dichloroethylene
Upper Hanover Water Authority
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
50
Samples
2
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 | 3.70 ppb | 6 | 4 | ND - 6.00 ppb |
| 2019 | 3.56 ppb | 5 | 3 | ND - 7.00 ppb |
| 2020 | 3.90 ppb | 9 | 5 | ND - 8.10 ppb |
| 2021 | 1.26 ppb | 10 | 2 | ND - 6.50 ppb |
| 2022 | ND | 13 | 0 | ND |
| 2023 | ND | 7 | 0 | ND |
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 |
|---|---|---|
| 2018-01-30 | 8001978-01 | 6.00 ppb |
| 2018-04-25 | 8008140-01 | 5.50 ppb |
| 2018-07-17 | 8017906-01 | 5.30 ppb |
| 2018-07-25 | 8019752-01 | ND |
| 2018-07-25 | 8019752-02 | ND |
| 2018-10-10 | 8028641-01 | 5.40 ppb |
| 2019-01-23 | 8038660-01 | 5.00 ppb |
| 2019-05-07 | 9009685-01 | 7.00 ppb |
| 2019-08-21 | 8038658-01 | ND |
| 2019-09-24 | 9034252-01 | ND |
| 2019-12-11 | 9033962-01 | 5.80 ppb |
| 2020-03-18 | 21847896.00 | 8.10 ppb |
| 2020-03-20 | 21847928.00 | 7.50 ppb |
| 2020-03-20 | 21847927.00 | ND |
| 2020-04-28 | 22024169.00 | 6.80 ppb |
| 2020-04-28 | 22024168.00 | ND |
| 2020-06-24 | 22417303.00 | ND |
| 2020-07-01 | 22417304.00 | 6.50 ppb |
| 2020-10-06 | 23183411.00 | 6.20 ppb |
| 2020-11-20 | 23362968.00 | ND |
| 2021-03-16 | 24061096.00 | ND |
| 2021-03-19 | 24061097.00 | 6.50 ppb |
| 2021-04-21 | 24248445.00 | ND |
| 2021-04-30 | 24248597.00 | ND |
| 2021-07-06 | 24829856.00 | ND |
| 2021-07-09 | 24830009.00 | ND |
| 2021-10-05 | 25405590.00 | 6.10 ppb |
| 2021-10-29 | 25405747.00 | ND |
| 2021-12-29 | 25765025.00 | ND |
| 2021-12-29 | 25765004.00 | ND |
| 2022-02-01 | 25943616.00 | ND |
| 2022-02-01 | 25943615.00 | ND |
| 2022-02-01 | 25943617.00 | ND |
| 2022-02-23 | 26118545.00 | ND |
| 2022-02-23 | 26118546.00 | ND |
| 2022-05-05 | 26649364.00 | ND |
| 2022-05-06 | 26649365.00 | ND |
| 2022-06-02 | 26649542.00 | ND |
| 2022-06-03 | 26649543.00 | ND |
| 2022-07-07 | 27037983.00 | ND |
| 2022-07-08 | 27037984.00 | ND |
| 2022-12-01 | 27999412.00 | ND |
| 2022-12-02 | 27999413.00 | ND |
| 2023-01-04 | 28173529.00 | ND |
| 2023-04-10 | 28703163.00 | ND |
| 2023-04-11 | 28703162.00 | ND |
| 2023-04-11 | 28703161.00 | ND |
| 2023-07-03 | 29302590.00 | ND |
| 2023-10-03 | 29700864.00 | ND |
| 2023-11-28 | 30246501.00 | ND |