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EWG's Tap Water Database — 2021 UPDATE

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1,1-Dichloroethylene

Liberty Utilities - Bellflower - Norwalk

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

MORE ABOUT THIS CONTAMINANT

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND40ND
2015ND40ND
20160.280 ppb52ND - 0.772 ppb
20170.289 ppb73ND - 0.730 ppb
20180.334 ppb84ND - 0.800 ppb
20190.418 ppb104ND - 1.40 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-04-179588-031-1300ND
2014-04-179588-026-1325ND
2014-04-179588-025-0730ND
2014-04-179588-016-0715ND
2015-04-099588-026-1325ND
2015-04-169588-025-0945ND
2015-05-079588-016-1235ND
2015-05-219588-031-0915ND
2016-05-129588-025-1125ND
2016-05-129588-031-12200.630 ppb
2016-05-199588-026-1435ND
2016-12-089588-016-1130ND
2016-12-289469-031-09300.772 ppb
2017-02-249588-031-09300.560 ppb
2017-04-069588-025-1000ND
2017-04-179588-016-1300ND
2017-04-289588-026-1145ND
2017-05-089588-031-11300.730 ppb
2017-08-039588-031-0840ND
2017-12-159588-031-10300.730 ppb
2018-02-229588-031-08150.650 ppb
2018-04-059588-025-0830ND
2018-04-099588-016-0800ND
2018-04-099588-026-0730ND
2018-05-119588-031-11100.610 ppb
2018-08-169588-031-08000.610 ppb
2018-09-139588-026-0945ND
2018-11-089588-031-11500.800 ppb
2019-01-089588-031-13401.000 ppb
2019-03-129588-016-0910ND
2019-04-109588-016-0930ND
2019-04-109588-031-13150.940 ppb
2019-04-109588-026-0000ND
2019-04-109588-025-0000ND
2019-07-029588-016-0900ND
2019-07-029588-031-09550.840 ppb
2019-10-089588-031-11561.40 ppb
2019-10-089588-016-1120ND