Know Your Environment. Protect Your Health.

Asbestos

King County Water District No 90

NOTE: King County Water District No 90 purchases water from Seattle Public Utilities which is required to test for asbestos. Sample information shown below was taken by Seattle Public Utilities.

Asbestos is a mineral fiber introduced into water by the dissolution of asbestos-containing minerals and from decay of asbestos cement in water mains. Asbestos causes cancer when ingested or inhaled.

 

4

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

MFL = million fibers per liter

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 7 MFL

The legal limit for asbestos, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.

MFL = million fibers per liter

All test results

NOTE: King County Water District No 90 purchases water from Seattle Public Utilities which is required to test for asbestos. Sample information shown below was taken by Seattle Public Utilities.

Date Lab ID Result
2018-09-04ND
2018-09-04ND
2021-08-184171961ND
2021-08-184171962ND