Strontium

City of Daly City

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	0.0572 ppb	6	6	0.0150 ppb - 0.140 ppb
2014	0.0988 ppb	18	18	0.0130 ppb - 0.240 ppb
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	N/A	0	0	N/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
2013-11-05	1311128-001D	0.0170 ppb
2013-11-05	1311130-001D	0.0150 ppb
2013-11-05	1311126-001C	0.0250 ppb
2013-11-05	1311127-001D	0.140 ppb
2013-11-05	1311131-001D	0.0160 ppb
2013-11-05	1311129-001D	0.130 ppb
2014-02-04	1402099-001D	0.1000 ppb
2014-02-04	1402096-001C	0.110 ppb
2014-02-04	1402097-001D	0.0990 ppb
2014-02-04	1402101-001D	0.160 ppb
2014-02-04	1402100-001D	0.0930 ppb
2014-02-04	1402098-001D	0.0920 ppb
2014-05-07	1405255-001D	0.130 ppb
2014-05-07	1405259-001D	0.0250 ppb
2014-05-07	1405256-001D	0.150 ppb
2014-05-07	1405260-001C	0.0690 ppb
2014-05-07	1405257-001D	0.0130 ppb
2014-05-07	1405258-001D	0.0140 ppb
2014-08-13	1408515-001D	0.150 ppb
2014-08-13	1408518-001D	0.0720 ppb
2014-08-13	1408520-001D	0.240 ppb
2014-08-13	1408517-001D	0.0830 ppb
2014-08-13	1408516-001C	0.120 ppb
2014-08-13	1408519-001D	0.0590 ppb