trans-1,2-Dichloroethylene

Deerwood Subdivision

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	12	ND
2019	ND	13	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
2018-02-26	LLH67791	ND
2018-02-26	LLH67793	ND
2018-02-26	LLH67792	ND
2018-05-10	LLH79900	ND
2018-05-10	LLH79901	ND
2018-05-10	LLH79909	ND
2018-08-15	LLH99376	ND
2018-08-15	LLH99363	ND
2018-08-15	LLH99375	ND
2018-10-31	LLI13469	ND
2018-10-31	LLI13468	ND
2018-10-31	LLI13480	ND
2019-02-21	LLI26628	ND
2019-02-21	LLI26627	ND
2019-02-21	LLI26625	ND
2019-05-31	LLI40256	ND
2019-05-31	LLI40265	ND
2019-05-31	LLI40266	ND
2019-09-09	LLI62406	ND
2019-09-09	LLI62407	ND
2019-09-09	LLI62404	ND
2019-10-31	LLI74079	ND
2019-10-31	LLI74074	ND
2019-10-31	LLI74073	ND
2019-12-17	LLI84105	ND