Know Your Environment. Protect Your Health.

1,1,1-Trichloroethane

City of Tigard

NOTE: City of Tigard purchases water from Lake Oswego - Tigard Water Supply which is required to test for 1,1,1-trichloroethane. Sample information shown below was taken by Lake Oswego - Tigard Water Supply.

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.

 

4

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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

NOTE: City of Tigard purchases water from Lake Oswego - Tigard Water Supply which is required to test for 1,1,1-trichloroethane. Sample information shown below was taken by Lake Oswego - Tigard Water Supply.

Date Lab ID Result
2020-11-18202011190312-VND
2021-10-27202110280645-VND
2022-01-19202201200821-VND
2023-10-0423-60551-VND