1,1-Dichloroethylene
East Lyme Water & Sewer Commission
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
120
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 |
|---|---|---|---|---|
| 2018 | 0.600 ppb | 18 | 8 | ND - 3.30 ppb |
| 2019 | 0.981 ppb | 26 | 16 | ND - 4.10 ppb |
| 2020 | 1.10 ppb | 20 | 15 | ND - 2.90 ppb |
| 2021 | 0.558 ppb | 19 | 11 | ND - 2.10 ppb |
| 2022 | 0.745 ppb | 22 | 13 | ND - 2.00 ppb |
| 2023 | 0.933 ppb | 15 | 8 | ND - 2.80 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 |
|---|---|---|
| 2018-02-06 | 115853GE | ND |
| 2018-02-06 | 115854GE | ND |
| 2018-02-06 | 115855GE | ND |
| 2018-02-06 | 115856GE | ND |
| 2018-05-22 | 117860GE | ND |
| 2018-05-22 | 117861GE | ND |
| 2018-09-04 | 119932 | 0.800 ppb |
| 2018-09-04 | 119934 | 3.30 ppb |
| 2018-09-04 | 119936 | 1.000 ppb |
| 2018-09-04 | 119938 | 0.500 ppb |
| 2018-09-07 | 120043 | ND |
| 2018-09-07 | 120044 | ND |
| 2018-12-05 | 121713 | 1.000 ppb |
| 2018-12-05 | 121715 | 1.000 ppb |
| 2018-12-05 | 121717 | 1.90 ppb |
| 2018-12-05 | 121719 | 1.30 ppb |
| 2018-12-18 | 121897 | ND |
| 2018-12-18 | 121898 | ND |
| 2019-03-06 | 123270 | 2.00 ppb |
| 2019-03-06 | 123272 | 0.900 ppb |
| 2019-03-06 | 123274 | 1.70 ppb |
| 2019-03-06 | 123276 | 1.40 ppb |
| 2019-03-06 | 123278 | ND |
| 2019-03-06 | 123279 | ND |
| 2019-06-18 | 125386 | 0.600 ppb |
| 2019-06-18 | 125388 | 1.30 ppb |
| 2019-06-18 | 125390 | 1.60 ppb |
| 2019-06-18 | 125392 | 1.60 ppb |
| 2019-06-27 | 125673 | ND |
| 2019-06-27 | 125674 | ND |
| 2019-09-10 | 127389 | ND |
| 2019-09-10 | 127390 | ND |
| 2019-09-10 | 127391 | ND |
| 2019-09-19 | 127669 | 0.700 ppb |
| 2019-09-19 | 127671 | 1.50 ppb |
| 2019-09-19 | 127673 | 2.30 ppb |
| 2019-09-19 | 127675 | 4.10 ppb |
| 2019-12-06 | 129279 | 0.900 ppb |
| 2019-12-06 | 129281 | 1.70 ppb |
| 2019-12-06 | 129283 | 1.60 ppb |
| 2019-12-06 | 129285 | 1.60 ppb |
| 2019-12-18 | 129475 | ND |
| 2019-12-18 | 129476 | ND |
| 2019-12-18 | 129477 | ND |
| 2020-03-04 | 130828 | 1.60 ppb |
| 2020-03-04 | 130830 | 0.900 ppb |
| 2020-03-04 | 130832 | 0.800 ppb |
| 2020-03-04 | 130834 | 1.10 ppb |
| 2020-06-04 | 132594 | 1.90 ppb |
| 2020-06-04 | 132596 | ND |
| 2020-06-04 | 132598 | 1.40 ppb |
| 2020-06-04 | 132600 | 1.000 ppb |
| 2020-06-12 | 132842 | ND |
| 2020-06-12 | 132843 | ND |
| 2020-06-12 | 132844 | ND |
| 2020-06-12 | 132845 | ND |
| 2020-09-11 | 134731 | 1.80 ppb |
| 2020-09-11 | 134733 | 1.10 ppb |
| 2020-09-11 | 134735 | 2.90 ppb |
| 2020-09-11 | 134737 | 2.00 ppb |
| 2020-12-07 | 136627 | 1.30 ppb |
| 2020-12-07 | 136629 | 0.900 ppb |
| 2020-12-07 | 136631 | 2.00 ppb |
| 2020-12-07 | 136633 | 1.30 ppb |
| 2021-03-08 | 138316 | 1.50 ppb |
| 2021-03-08 | 138318 | 0.900 ppb |
| 2021-03-08 | 138320 | 2.10 ppb |
| 2021-03-08 | 138322 | 0.800 ppb |
| 2021-06-10 | 140339 | ND |
| 2021-06-10 | 140341 | ND |
| 2021-06-10 | 140343 | 0.600 ppb |
| 2021-06-10 | 140345 | ND |
| 2021-07-28 | 141339 | ND |
| 2021-09-13 | 142289 | 0.700 ppb |
| 2021-09-13 | 142291 | 0.900 ppb |
| 2021-09-13 | 142293 | 1.000 ppb |
| 2021-09-13 | 142295 | ND |
| 2021-09-22 | 142552 | ND |
| 2021-12-14 | 144217 | ND |
| 2021-12-14 | 144219 | 0.500 ppb |
| 2021-12-14 | 144221 | 0.800 ppb |
| 2021-12-14 | 144223 | 0.800 ppb |
| 2021-12-22 | 144436 | ND |
| 2022-03-02 | 145828 | ND |
| 2022-03-02 | 145830 | ND |
| 2022-03-02 | 145832 | 0.800 ppb |
| 2022-03-02 | 145834 | 0.900 ppb |
| 2022-03-04 | 145957 | ND |
| 2022-03-04 | 145958 | ND |
| 2022-03-04 | 145959 | ND |
| 2022-06-06 | 148441 | 1.000 ppb |
| 2022-06-06 | 148443 | ND |
| 2022-06-06 | 148445 | 1.50 ppb |
| 2022-06-06 | 148447 | 1.10 ppb |
| 2022-06-23 | 149001 | ND |
| 2022-09-09 | 151092 | 1.50 ppb |
| 2022-09-09 | 151094 | 1.000 ppb |
| 2022-09-09 | 151096 | 2.00 ppb |
| 2022-09-09 | 151098 | 1.40 ppb |
| 2022-09-21 | 151447 | ND |
| 2022-12-07 | 153661 | ND |
| 2022-12-08 | 153714 | 1.50 ppb |
| 2022-12-08 | 153716 | 1.000 ppb |
| 2022-12-08 | 153718 | 1.50 ppb |
| 2022-12-08 | 153720 | 1.20 ppb |
| 2023-03-07 | 156245 | 1.40 ppb |
| 2023-03-07 | 156247 | 1.20 ppb |
| 2023-03-07 | 156249 | 1.90 ppb |
| 2023-03-07 | 156251 | 1.60 ppb |
| 2023-06-05 | 158999 | 1.60 ppb |
| 2023-06-05 | 159001 | 2.80 ppb |
| 2023-06-05 | 159003 | 1.90 ppb |
| 2023-06-05 | 159005 | 1.60 ppb |
| 2023-06-07 | 159215 | ND |
| 2023-09-18 | 163136 | ND |
| 2023-09-18 | 163137 | ND |
| 2023-09-18 | 163138 | ND |
| 2023-09-18 | 163139 | ND |
| 2023-09-18 | 163140 | ND |
| 2023-12-15 | 166455 | ND |