Know Your Environment. Protect Your Health.

1,1,1-Trichloroethane

Unalaska Water System

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020N/A00N/A
2021N/A00N/A
2022ND40ND
2023ND20ND

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
2018-11-28VO*1186705002ND
2018-11-28VO*1186705005ND
2018-11-28VO*1186705008ND
2019-09-131195445003ND
2022-07-251224305006ND
2022-07-251224305008ND
2022-07-251224305007ND
2022-12-021227155003ND
2023-02-151230642002ND
2023-02-151230642003ND