Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

cis-1,2-Dichloroethylene

City of Ripon

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.600 ppb41ND - 2.40 ppb
2013ND20ND
2014ND10ND
20150.750 ppb41ND - 3.00 ppb
20160.533 ppb31ND - 1.60 ppb
20171.07 ppb31ND - 3.20 ppb

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
2012-06-132625-022-1013ND
2012-06-132625-007-0927ND
2012-06-132625-003-07252.40 ppb
2012-07-182625-024-1040ND
2013-06-262625-010-1425ND
2013-10-292625-020-0935ND
2014-06-052625-003-1445ND
2015-06-082625-022-1030ND
2015-06-082625-007-0955ND
2015-06-082625-003-11383.00 ppb
2015-07-082625-024-0955ND
2016-06-152625-010-0820ND
2016-06-152625-003-08001.60 ppb
2016-10-202625-020-1045ND
2017-06-142625-010-0930ND
2017-06-142625-003-08503.20 ppb
2017-10-242625-020-1020ND