Know Your Environment. Protect Your Health.

1,1,1-Trichloroethane

Harris County Municipal Utility District 189

1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND10ND
2022ND10ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 200 ppb

The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-05-17AE26817ND
2018-05-17AE26821ND
2019-07-08AE73468ND
2019-07-08AE73470ND
2020-06-23AF16542ND
2020-06-23AF16548ND
2021-10-14AF73563ND
2022-04-05AF92017ND
2023-07-20AG49613ND
2023-10-12AG59736ND
2023-11-02AG62177ND