Know Your Environment. Protect Your Health.

1,1-Dichloroethylene

East Hampton WPCA - Village Center

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

 

29

Samples

2

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
20190.840 ppb51ND - 4.20 ppb
20200.440 ppb51ND - 2.20 ppb
20211.16 ppb51ND - 5.80 ppb
20221.78 ppb51ND - 8.90 ppb
20231.78 ppb51ND - 8.90 ppb

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
2018-01-30115734GEND
2018-05-07117532GEND
2018-07-10118761GEND
2018-10-23120892ND
2019-01-15122347ND
2019-04-16124067ND
2019-07-151260444.20 ppb
2019-09-17127562ND
2019-11-19128973ND
2020-02-04130248ND
2020-04-07131452ND
2020-07-201336182.20 ppb
2020-09-01134519ND
2020-11-03135933ND
2021-01-25137562ND
2021-05-11139690ND
2021-07-271413315.80 ppb
2021-09-21142543ND
2021-12-28144446ND
2022-03-29146620ND
2022-06-21148919ND
2022-07-251497978.90 ppb
2022-09-20151363ND
2022-12-21154119ND
2023-03-15156497ND
2023-06-06159159ND
2023-07-281614098.90 ppb
2023-09-28163602ND
2023-12-28166835ND