EWG's Tap Water Database — 2019 UPDATE




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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
2012219.7 ppb1212195.0 ppb - 245.0 ppb
2013222.3 ppb99202.0 ppb - 244.0 ppb
2014218.9 ppb1414204.0 ppb - 245.0 ppb
2015208.2 ppb1212169.0 ppb - 232.0 ppb
2016213.3 ppb1212193.0 ppb - 240.0 ppb
2017210.2 ppb66195.0 ppb - 234.0 ppb

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
2013-03-12AB94290202.0 ppb
2013-03-26AB94636222.0 ppb
2013-03-26AB94638219.0 ppb
2013-05-29AB97336227.0 ppb
2013-05-29AB97338236.0 ppb
2013-08-20AC08936209.0 ppb
2013-08-20AC08938214.0 ppb
2013-11-18AC14929228.0 ppb
2013-11-18AC14931244.0 ppb