Know Your Environment. Protect Your Health.

1,1-Dichloroethylene

Harris County Fresh Water Supply District 1a

NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Baytown Area Water Authority.

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

 

11

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

NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Baytown Area Water Authority.

Date Lab ID Result
2018-08-03AE35860ND
2019-09-06AE82509ND
2020-07-14AF19344ND
2021-08-09AF65379ND
2021-10-20AF74188ND
2022-01-12AF80002ND
2022-04-04AF91855ND
2022-07-05AG03267ND
2022-07-05AG03269ND
2023-01-12AG24428ND
2023-07-11AG47888ND