trans-1,2-Dichloroethylene
Audubon Water Company
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 | 22 | 0 | ND |
| 2015 | ND | 24 | 0 | ND |
| 2016 | ND | 24 | 0 | ND |
| 2017 | ND | 23 | 0 | ND |
| 2018 | ND | 23 | 0 | ND |
| 2019 | ND | 22 | 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 |
|---|---|---|
| 2014-01-13 | 1066988001 | ND |
| 2014-01-13 | 1066988002 | ND |
| 2014-01-13 | 1066988003 | ND |
| 2014-02-27 | 1073775001 | ND |
| 2014-04-02 | 1079479001 | ND |
| 2014-04-02 | 1079479002 | ND |
| 2014-04-02 | 1079479004 | ND |
| 2014-04-02 | 1079479003 | ND |
| 2014-04-23 | 2003262001 | ND |
| 2014-04-23 | 2003262002 | ND |
| 2014-08-28 | 2026276001 | ND |
| 2014-08-28 | 2026276002 | ND |
| 2014-08-28 | 2026276003 | ND |
| 2014-09-09 | 2028135001 | ND |
| 2014-09-09 | 2028135002 | ND |
| 2014-09-09 | 2028135003 | ND |
| 2014-10-06 | 2032858001 | ND |
| 2014-10-06 | 2032858002 | ND |
| 2014-10-06 | 2032858003 | ND |
| 2014-10-06 | 2032858004 | ND |
| 2014-11-06 | 2038813001 | ND |
| 2014-11-06 | 2038814001 | ND |
| 2015-03-10 | 12517670 | ND |
| 2015-03-10 | 12517733 | ND |
| 2015-03-10 | 12517712 | ND |
| 2015-03-10 | 12517691 | ND |
| 2015-03-18 | 12517754 | ND |
| 2015-03-18 | 12517775 | ND |
| 2015-03-18 | 12517796 | ND |
| 2015-03-26 | 12635366 | ND |
| 2015-06-01 | 12751829 | ND |
| 2015-06-01 | 12751850 | ND |
| 2015-06-01 | 12751871 | ND |
| 2015-06-01 | 12751892 | ND |
| 2015-06-05 | 12884474 | ND |
| 2015-09-17 | 13266497 | ND |
| 2015-09-17 | 13266518 | ND |
| 2015-09-17 | 13266539 | ND |
| 2015-09-17 | 13266560 | ND |
| 2015-09-24 | 13266581 | ND |
| 2015-10-19 | 13391315 | ND |
| 2015-11-19 | 13515895 | ND |
| 2015-11-19 | 13515916 | ND |
| 2015-11-19 | 13515937 | ND |
| 2015-11-19 | 13515958 | ND |
| 2015-11-19 | 13515979 | ND |
| 2016-02-05 | 13872266 | ND |
| 2016-02-05 | 13872287 | ND |
| 2016-02-05 | 13872308 | ND |
| 2016-02-05 | 13872329 | ND |
| 2016-03-17 | 13988311 | ND |
| 2016-04-04 | 13988342 | ND |
| 2016-04-04 | 13988363 | ND |
| 2016-04-04 | 13988384 | ND |
| 2016-04-04 | 13988405 | ND |
| 2016-04-13 | 14105393 | ND |
| 2016-04-13 | 14105414 | ND |
| 2016-04-22 | 14572536 | ND |
| 2016-04-25 | 14572557 | ND |
| 2016-09-16 | 14910415 | ND |
| 2016-09-16 | 14910436 | ND |
| 2016-09-16 | 14910457 | ND |
| 2016-09-16 | 14910478 | ND |
| 2016-09-29 | 14910797 | ND |
| 2016-10-05 | 15078210 | ND |
| 2016-10-05 | 15078231 | ND |
| 2016-10-05 | 15078252 | ND |
| 2016-10-05 | 15078273 | ND |
| 2016-10-05 | 15078294 | ND |
| 2016-12-08 | 15374253 | ND |
| 2017-01-17 | 15519929 | ND |
| 2017-02-10 | 15657973 | ND |
| 2017-02-10 | 15657994 | ND |
| 2017-02-10 | 15658015 | ND |
| 2017-02-10 | 15658036 | ND |
| 2017-02-10 | 15658057 | ND |
| 2017-02-23 | 15658078 | ND |
| 2017-05-05 | 15940546 | ND |
| 2017-05-05 | 15940567 | ND |
| 2017-05-05 | 15940588 | ND |
| 2017-05-05 | 15940609 | ND |
| 2017-09-19 | 16729570 | ND |
| 2017-09-19 | 16729591 | ND |
| 2017-09-19 | 16729612 | ND |
| 2017-09-19 | 16729633 | ND |
| 2017-09-20 | 16729654 | ND |
| 2017-09-25 | 16729675 | ND |
| 2017-10-02 | 16729795 | ND |
| 2017-10-02 | 16729816 | ND |
| 2017-10-02 | 16729837 | ND |
| 2017-10-02 | 16729858 | ND |
| 2017-10-05 | 16882750 | ND |
| 2017-10-17 | 16882913 | ND |
| 2018-03-02 | 2299268001 | ND |
| 2018-03-02 | 2299268002 | ND |
| 2018-03-02 | 2299268003 | ND |
| 2018-03-02 | 2299268004 | ND |
| 2018-03-28 | 2305330001 | ND |
| 2018-04-01 | 2306020001 | ND |
| 2018-04-02 | 2306020002 | ND |
| 2018-04-02 | 2306020003 | ND |
| 2018-04-02 | 2306020004 | ND |
| 2018-04-02 | 2306020005 | ND |
| 2018-09-17 | 2338753001 | ND |
| 2018-09-17 | 2338753002 | ND |
| 2018-09-17 | 2338753003 | ND |
| 2018-09-17 | 2338753004 | ND |
| 2018-09-17 | 2338753005 | ND |
| 2018-09-18 | 2339343001 | ND |
| 2018-09-20 | 2339702001 | ND |
| 2018-09-21 | 2340025001 | ND |
| 2018-10-01 | 2341512001 | ND |
| 2018-10-01 | 2341512002 | ND |
| 2018-10-01 | 2341512003 | ND |
| 2018-10-01 | 2341512004 | ND |
| 2018-10-24 | 2346425001 | ND |
| 2019-03-22 | 3023817002 | ND |
| 2019-03-22 | 3023817001 | ND |
| 2019-03-22 | 3023817005 | ND |
| 2019-03-22 | 3023817003 | ND |
| 2019-03-22 | 3023817006 | ND |
| 2019-03-22 | 3023817004 | ND |
| 2019-04-10 | 3027288001 | ND |
| 2019-04-10 | 3027288003 | ND |
| 2019-04-10 | 3027288005 | ND |
| 2019-04-10 | 3027288007 | ND |
| 2019-04-24 | 3029820001 | ND |
| 2019-07-25 | 3047779001 | ND |
| 2019-07-25 | 3047779003 | ND |
| 2019-07-25 | 3047779005 | ND |
| 2019-07-25 | 3047779007 | ND |
| 2019-08-05 | 3049543001 | ND |
| 2019-10-16 | 3064410005 | ND |
| 2019-10-16 | 3064409001 | ND |
| 2019-10-16 | 3064410001 | ND |
| 2019-10-16 | 3064410003 | ND |
| 2019-10-16 | 3064410007 | ND |
| 2019-10-22 | 3065363001 | ND |