trans-1,2-Dichloroethylene
Cerritos - City, 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.
Samples
Samples exceeding legal limit (MCL)
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 | 6 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL) 100 ppb
The legal limit for trans-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 |
|---|---|---|
| 2014-02-14 | 2706-003-0920 | ND |
| 2014-02-14 | 2706-002-0900 | ND |
| 2014-05-22 | 2706-002-0855 | ND |
| 2014-08-21 | 2706-002-0936 | ND |
| 2014-08-21 | 2706-001-0948 | ND |
| 2014-11-20 | 2706-002-0920 | ND |
| 2015-02-12 | 2706-001-1200 | ND |
| 2015-02-12 | 2706-003-1250 | ND |
| 2015-06-30 | 2706-002-1400 | ND |
| 2016-02-25 | 9588-001-1115 | ND |
| 2016-02-25 | 9588-003-1140 | ND |
| 2016-05-25 | 9588-002-1340 | ND |
| 2016-08-29 | 9588-002-1200 | ND |
| 2016-11-28 | 9588-002-1130 | ND |
| 2017-02-23 | 9588-001-1040 | ND |
| 2017-02-23 | 9588-003-1115 | ND |
| 2017-02-23 | 9588-002-1100 | ND |
| 2017-05-24 | 9588-002-1110 | ND |
| 2017-08-24 | 9588-002-1145 | ND |
| 2017-10-19 | 9588-002-1205 | ND |
| 2018-02-22 | 9588-003-1130 | ND |
| 2018-02-22 | 9588-002-1210 | ND |
| 2018-02-22 | 9588-001-1110 | ND |
| 2018-05-24 | 9588-002-1215 | ND |
| 2018-08-15 | 9588-002-0810 | ND |
| 2018-11-27 | 9588-002-0820 | ND |
| 2019-02-13 | 9588-002-1005 | ND |
| 2019-02-13 | 9588-003-0835 | ND |
| 2019-02-13 | 9588-001-0755 | ND |
| 2019-05-23 | 9588-002-0930 | ND |
| 2019-08-08 | 9588-002-0945 | ND |
| 2019-11-07 | 9588-002-0935 | ND |