cis-1,2-Dichloroethylene
Exeter Water Department
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
22
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | 0.280 ppb | 5 | 2 | ND - 0.800 ppb |
| 2017 | ND | 5 | 0 | ND |
| 2018 | 0.260 ppb | 5 | 2 | ND - 0.690 ppb |
| 2019 | 0.315 ppb | 2 | 1 | ND - 0.630 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for cis-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-07-09 | 133509.01 | ND |
| 2014-10-09 | 136708.02 | ND |
| 2015-07-16 | 145750.01 | ND |
| 2015-09-09 | 147823.01 | ND |
| 2015-11-18 | 150486.01 | ND |
| 2016-01-13 | 152193.01 | 0.800 ppb |
| 2016-04-07 | 154592.01 | 0.600 ppb |
| 2016-07-13 | 158246.01 | ND |
| 2016-07-21 | 158588.01 | ND |
| 2016-10-04 | 161298.01 | ND |
| 2017-02-27 | 165999.01 | ND |
| 2017-04-12 | 167482.01 | ND |
| 2017-07-11 | 170940.01 | ND |
| 2017-07-24 | 171382.01 | ND |
| 2017-10-03 | 174234.01 | ND |
| 2018-01-10 | 177792.01 | ND |
| 2018-04-03 | 180302.01 | ND |
| 2018-07-11 | 184059.01 | ND |
| 2018-07-31 | 184895.01 | 0.610 ppb |
| 2018-10-03 | 187376.01 | 0.690 ppb |
| 2019-07-10 | 197719.01 | ND |
| 2019-10-08 | 201538.01 | 0.630 ppb |