Know Your Environment. Protect Your Health.

1,1-Dichloroethylene

St John Water District 1

1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 7 ppb

The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-2335370117004ND
2018-01-2335370117004ND
2019-01-2235444040001ND
2019-01-2235444040001ND
2020-03-0535535517001ND
2021-01-2835608068001ND
2022-02-0235694871001ND
2023-03-2035787603001ND