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EWG's Tap Water Database — 2019 UPDATE

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Strontium-90

Los Angeles Department of Water and Power

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. Read More.

Strontium-90 has been emitted widely by nuclear power plants, weapons facilities, waste sites and nuclear research facilities. Strontium-90 is structurally similar to calcium and is thus taken up into bones. The chief health concerns from strontium-90 exposure are bone cancer and leukemia.

No federal drinking water standards for strontium-90 exist. California set a legal maximum of 8 picocuries of strontium-90 radioactivity per liter of water. California also has a public health goal of no more than 0.35 picocuries of strontium-90 per liter of drinking water. According to studies by the U.S. Geological Survey, strontium-90 also is a concern for water quality in private wells.

Click here to read more on radiological contaminants.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND10ND
2014ND20ND
2015ND30ND
2016ND20ND
2017ND30ND

pCi/L = picocuries per liter

State and national drinking water standards and health guidelines

EWG Health Guideline 0.35 pCi/L

The EWG Health Guideline of 0.35 pCi/L for strontium-90 was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

pCi/L = picocuries per liter

All test results

Date Lab ID Result
2012-08-140010-133-1030ND
2012-08-140010-011-1200ND
2013-05-090010-011-1025ND
2014-05-140010-011-1115ND
2014-12-230010-133-1000ND
2015-01-210010-205-1130ND
2015-05-190010-011-0900ND
2015-08-040010-133-0645ND
2016-08-170010-011-1010ND
2016-08-230010-133-1005ND
2017-07-120010-205-1000ND
2017-08-010010-133-0940ND
2017-08-210010-011-1010ND