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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Monterey Rural Water System Inc.

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND120ND
2017N/A00N/A
2018N/A00N/A
2019ND60ND

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
2016-03-1635235028005ND
2016-03-1635235028004ND
2016-03-1635235028003ND
2016-03-1635235028004ND
2016-03-1635235028005ND
2016-03-1635235028003ND
2016-12-0835282709001ND
2016-12-0835282709002ND
2016-12-0835282709003ND
2016-12-0835282709003ND
2016-12-0835282709002ND
2016-12-0835282709001ND
2019-12-1135518398001ND
2019-12-1135518398002ND
2019-12-1135518398001ND
2019-12-1135518398002ND
2019-12-1935520417001ND
2019-12-1935520417001ND