Know Your Environment. Protect Your Health.

1,1,1,2-Tetrachloroethane

City of Puyallup

NOTE: City of Puyallup purchases water from City of Tacoma which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by City of Tacoma.

1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND30ND
2020N/A00N/A
2021ND50ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1 ppb

The EWG Health Guideline of 1 ppb for 1,1,1,2-tetrachloroethane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

NOTE: City of Puyallup purchases water from City of Tacoma which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by City of Tacoma.

Date Lab ID Result
2018-02-07ND
2018-03-12ND
2018-03-19ND
2019-01-02ND
2019-07-24ND
2019-12-03ND
2021-06-214137309ND
2021-06-214137308ND
2021-06-214137307ND
2021-06-214233773ND
2021-06-304142811ND
2022-09-154368469ND
2022-09-234368470ND
2022-10-114363364ND
2022-11-154428454ND
2022-11-164388597ND
2023-06-204542958ND
2023-07-124542960ND
2023-07-124542959ND