trans-1,2-Dichloroethylene
City of Sacramento Main
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 |
|---|---|---|---|---|
| 2014 | ND | 15 | 0 | ND |
| 2015 | ND | 15 | 0 | ND |
| 2016 | ND | 17 | 0 | ND |
| 2017 | ND | 15 | 0 | ND |
| 2018 | ND | 17 | 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 |
|---|---|---|
| 2014-01-06 | 9054-056-1120 | ND |
| 2014-02-05 | 2706-042-1140 | ND |
| 2014-02-06 | 2706-023-1330 | ND |
| 2014-02-19 | 2706-022-1045 | ND |
| 2014-02-21 | 2706-055-1200 | ND |
| 2014-02-26 | 2706-029-1020 | ND |
| 2014-03-20 | 2706-052-1015 | ND |
| 2014-03-25 | 2706-050-1030 | ND |
| 2014-04-11 | 2706-015-0930 | ND |
| 2014-04-17 | 2706-038-1310 | ND |
| 2014-08-25 | 9054-002-0905 | ND |
| 2014-08-25 | 9054-008-0910 | ND |
| 2014-10-14 | 9054-040-0945 | ND |
| 2014-12-02 | 2706-017-1050 | ND |
| 2014-12-03 | 2706-054-1045 | ND |
| 2015-01-20 | 2706-016-0955 | ND |
| 2015-08-11 | 9054-002-1005 | ND |
| 2015-08-11 | 9054-008-1055 | ND |
| 2015-10-15 | 9054-018-1208 | ND |
| 2015-10-15 | 9054-038-0945 | ND |
| 2015-10-15 | 9054-050-1214 | ND |
| 2015-10-15 | 9054-034-1307 | ND |
| 2015-10-15 | 9054-032-1026 | ND |
| 2015-10-15 | 9054-052-1030 | ND |
| 2015-10-15 | 9054-030-1125 | ND |
| 2015-10-15 | 9054-054-1056 | ND |
| 2015-10-15 | 9054-055-1340 | ND |
| 2015-10-15 | 9054-028-1138 | ND |
| 2015-10-15 | 9054-027-1100 | ND |
| 2015-12-03 | 9054-041-1026 | ND |
| 2016-02-04 | 9054-037-0950 | ND |
| 2016-03-01 | 9054-009-1248 | ND |
| 2016-04-19 | 9054-051-1050 | ND |
| 2016-04-21 | 9054-028-1103 | ND |
| 2016-05-12 | 9054-040-1220 | ND |
| 2016-05-31 | 9054-035-1048 | ND |
| 2016-06-13 | 9054-010-1041 | ND |
| 2016-07-26 | 9054-056-1042 | ND |
| 2016-07-26 | 9054-045-1012 | ND |
| 2016-08-02 | 9054-002-1005 | ND |
| 2016-08-02 | 9054-008-1130 | ND |
| 2016-10-11 | 9054-056-1100 | ND |
| 2016-10-11 | 9054-040-1432 | ND |
| 2016-10-11 | 9054-051-1530 | ND |
| 2016-10-11 | 9054-045-1358 | ND |
| 2016-10-11 | 9054-035-1407 | ND |
| 2016-11-21 | 9054-009-1255 | ND |
| 2017-03-07 | 9054-042-1010 | ND |
| 2017-03-07 | 9054-023-1130 | ND |
| 2017-03-20 | 9054-022-1108 | ND |
| 2017-03-20 | 9054-029-1230 | ND |
| 2017-04-03 | 9054-015-1008 | ND |
| 2017-04-10 | 9054-056-1022 | ND |
| 2017-05-08 | 9054-051-1222 | ND |
| 2017-05-09 | 9054-035-1424 | ND |
| 2017-05-09 | 9054-040-1505 | ND |
| 2017-06-08 | 9054-045-1000 | ND |
| 2017-06-20 | 9054-017-1130 | ND |
| 2017-08-02 | 9054-002-1018 | ND |
| 2017-08-02 | 9054-008-1000 | ND |
| 2017-08-24 | 9054-054-1300 | ND |
| 2017-08-24 | 9054-032-0912 | ND |
| 2018-01-08 | 9054-056-1325 | ND |
| 2018-02-26 | 9054-052-1408 | ND |
| 2018-02-26 | 9054-037-1210 | ND |
| 2018-02-26 | 9054-038-1241 | ND |
| 2018-02-26 | 9054-040-1316 | ND |
| 2018-02-26 | 9054-041-1433 | ND |
| 2018-02-26 | 9054-030-1125 | ND |
| 2018-02-27 | 9054-009-1138 | ND |
| 2018-02-27 | 9054-035-1259 | ND |
| 2018-02-27 | 9054-051-1326 | ND |
| 2018-02-27 | 9054-010-1100 | ND |
| 2018-02-27 | 9054-028-1555 | ND |
| 2018-02-27 | 9054-018-1450 | ND |
| 2018-02-27 | 9054-027-1523 | ND |
| 2018-02-27 | 9054-034-1228 | ND |
| 2018-08-07 | 9054-008-1220 | ND |
| 2018-08-07 | 9054-002-0950 | ND |
| 2019-02-04 | 9054-040-1331 | ND |
| 2019-02-04 | 9054-051-1310 | ND |
| 2019-02-04 | 9054-035-1245 | ND |
| 2019-04-08 | 9054-056-1221 | ND |
| 2019-08-06 | 9054-008-1210 | ND |
| 2019-08-06 | 9054-002-0940 | ND |