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EWG's Tap Water Database — 2021 UPDATE

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Strontium

Issaquah Water System

Strontium is a metal that accumulates in the bones. Radioactive strontium-90 can cause bone cancer and leukemia, and any form of strontium at high doses can harm bone health.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.101 ppb880.0693 ppb - 0.137 ppb
20140.0749 ppb880.0550 ppb - 0.104 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1,500 ppb

The EWG Health Guideline of 1,500 ppb for strontium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against harm to bones.

ppb = parts per billion

All test results

Date Lab ID Result
2013-07-22WA97-SE1-13-13070.137 ppb
2013-07-22WA97-SE1-13-13090.0877 ppb
2013-07-22WA97-SE1-13-13070.114 ppb
2013-07-22WA97-SE1-13-13070.0913 ppb
2013-07-22WA97-SE1-13-13090.122 ppb
2013-07-22WA97-SE1-13013070.0753 ppb
2013-07-22WA97-SE1-13-13070.109 ppb
2013-07-22WA97-SE1-13-13070.0693 ppb
2014-01-08WA97-SE2-14-00490.104 ppb
2014-01-08WA97-SE2-14-00490.0680 ppb
2014-01-08WA97-SE2-14-00490.0690 ppb
2014-01-08WA97-SE2-14-00490.0860 ppb
2014-01-08WA97-SE2-14-00490.0800 ppb
2014-01-08WA97-SE2-14-00490.0550 ppb
2014-01-08WA97-SE2-14-00490.0810 ppb
2014-01-08WA97-SE2-14-00490.0560 ppb