Know Your Environment. Protect Your Health.

1,1-Dichloroethylene

Great Valley Town Water District #3 (bonne Val)

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

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
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
2018-11-26EHS1800051958-01-POCND
2019-10-283067813001ND
2020-12-153148598001ND
2021-10-19EHS2100095360-POCND
2022-10-25R2210311-001ND
2023-12-13R2311584-001ND