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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Fairfax County 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.

MORE ABOUT THIS CONTAMINANT

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND70ND
2015ND50ND
2016ND50ND
2017ND50ND
2018ND70ND
2019ND70ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for cis-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
2014-01-09FW14010902-03_VOND
2014-01-09FW14010902-05_VOND
2014-01-09FW14010902-04_VOND
2014-07-31FW14071802-03_VOND
2014-07-31FW14071802-05_VOND
2014-07-31FW14071802-04_VOND
2014-07-31FW14071802-06_VOND
2015-01-1400125-FAIRFAX COND
2015-07-2300125-FAIRFAX COND
2015-07-2300125-FAIRFAX COND
2015-07-2300125-FAIRFAX COND
2015-07-2300125-FAIRFAX COND
2016-01-13FW151230004-04_VND
2016-07-21FW160617086-03_VND
2016-07-21FW160617086-04_VND
2016-07-21FW160617086-05_VND
2016-07-21FW160617086-06_VND
2017-03-03FW170223005-04_VND
2017-09-08FW170821071-03_VND
2017-09-08FW170821071-06_VND
2017-09-08FW170821071-05_VND
2017-09-08FW170821071-04_VND
2018-01-22FW180118015-03_VND
2018-01-22FW180118015-04_VND
2018-01-22FW180118015-05_VND
2018-07-19FW180711008-03_VND
2018-07-19FW180711008-04_VND
2018-07-19FW180711008-05_VND
2018-07-19FW180711008-06_VND
2019-01-09FW181115006-03_VND
2019-01-09FW181115006-04_VND
2019-01-09FW181115006-05_VND
2019-07-12FW190626020-03_VND
2019-07-12FW190626020-04_VND
2019-07-12FW190626020-05_VND
2019-07-12FW190626020-06_VND