cis-1,2-Dichloroethylene
Freeport
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.
18
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 | 0.230 ppb | 4 | 1 | ND - 0.920 ppb |
| 2015 | 0.380 ppb | 3 | 1 | ND - 1.14 ppb |
| 2016 | 0.560 ppb | 2 | 1 | ND - 1.12 ppb |
| 2017 | 0.455 ppb | 2 | 1 | ND - 0.910 ppb |
| 2018 | 0.433 ppb | 3 | 1 | ND - 1.30 ppb |
| 2019 | 0.210 ppb | 4 | 1 | ND - 0.840 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 |
|---|---|---|
| 2014-01-14 | 1401560-001A | 0.920 ppb |
| 2014-04-15 | 1404933-001A | ND |
| 2014-07-15 | 1407A31-001A | ND |
| 2014-10-14 | 1410825-001A | ND |
| 2015-01-20 | 1501B68-001A | 1.14 ppb |
| 2015-01-20 | 1501B68-002A | ND |
| 2015-01-20 | 1501B68-004A | ND |
| 2016-01-12 | 1601642-002A | ND |
| 2016-01-12 | 1601642-001A | 1.12 ppb |
| 2017-01-10 | 1701670-001A | ND |
| 2017-01-18 | 1701B80-001A | 0.910 ppb |
| 2018-01-09 | 1801624-001A | 1.30 ppb |
| 2018-01-09 | 1801624-003A | ND |
| 2018-01-09 | 1801624-005A | ND |
| 2019-01-15 | 1901A98-001A | 0.840 ppb |
| 2019-01-15 | 1901A98-003A | ND |
| 2019-04-09 | 1904805-001A | ND |
| 2019-07-16 | 9073749-01 | ND |