Strontium

San Jose Water Company

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	0.292 ppb	30	30	0.130 ppb - 0.710 ppb
2014	N/A	0	0	N/A
2015	0.330 ppb	2	2	0.240 ppb - 0.420 ppb
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
2013-08-05	2872073	0.210 ppb
2013-08-05	2872047	0.130 ppb
2013-08-05	2871996	0.430 ppb
2013-08-05	2872013	0.440 ppb
2013-08-05	2871980	0.460 ppb
2013-08-12	2876655	0.210 ppb
2013-08-12	2876808	0.380 ppb
2013-08-12	2876814	0.160 ppb
2013-08-12	2876651	0.210 ppb
2013-08-12	2876647	0.190 ppb
2013-08-19	2883555	0.470 ppb
2013-08-19	2882279	0.150 ppb
2013-08-19	2882208	0.290 ppb
2013-08-19	2883566	0.710 ppb
2013-08-19	2882255	0.300 ppb
2013-08-26	2886323	0.360 ppb
2013-08-26	2886344	0.670 ppb
2013-08-26	2886355	0.490 ppb
2013-08-27	2886934	0.320 ppb
2013-08-28	2889124	0.220 ppb
2013-09-20	2902774	0.240 ppb
2013-09-23	2902777	0.300 ppb
2013-11-06	2927614	0.170 ppb
2013-11-06	2927603	0.200 ppb
2013-11-06	2927585	0.200 ppb
2013-11-06	2927589	0.160 ppb
2013-11-06	2927577	0.180 ppb
2013-11-06	2927581	0.180 ppb
2013-11-06	2927625	0.180 ppb
2013-11-06	2927649	0.150 ppb
2015-02-11	3189333	0.420 ppb
2015-02-11	3189325	0.240 ppb