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EWG's Tap Water Database

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Strontium

Clearwater 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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013370.0 ppb77200.0 ppb - 490.0 ppb
2014279.9 ppb101089.0 ppb - 430.0 ppb
201583.0 ppb1183.0 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 1,500 ppb

The 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 Result
2013-12-06270.0 ppb
2013-12-10330.0 ppb
2013-12-11350.0 ppb
2013-12-16480.0 ppb
2013-12-16490.0 ppb
2013-12-17200.0 ppb
2013-12-18470.0 ppb
2014-03-18420.0 ppb
2014-03-18300.0 ppb
2014-06-23320.0 ppb
2014-06-23160.0 ppb
2014-06-23250.0 ppb
2014-06-24340.0 ppb
2014-06-2489.0 ppb
2014-06-24320.0 ppb
2014-09-24430.0 ppb
2014-10-09170.0 ppb
2015-08-0583.0 ppb