Know Your Environment. Protect Your Health.

trans-1,2-Dichloroethylene

Guilford Water Authority

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND30ND
2021ND50ND
2022ND10ND
2023ND70ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-05-29(104)ND
2018-09-04(104)ND
2018-12-11(104)ND
2019-03-05(104)ND
2020-11-0223491227.00ND
2020-11-0223491206.00ND
2020-11-0223491185.00ND
2021-03-0924197198.00ND
2021-03-0924197219.00ND
2021-03-2924197241.00ND
2021-03-2924197262.00ND
2021-11-0425719755.00ND
2022-04-2526601196.00ND
2023-05-1729053146.00ND
2023-05-1729053167.00ND
2023-05-2429053217.00ND
2023-05-2429053196.00ND
2023-08-0129447932.00ND
2023-08-0129447952.00ND
2023-08-0129447912.00ND