Strontium

City of Humble

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	0.426 ppb	14	14	0.110 ppb - 0.550 ppb
2014	0.381 ppb	14	14	0.260 ppb - 0.580 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
2013-09-16	2897622	0.450 ppb
2013-09-16	2897701	0.440 ppb
2013-09-16	2897790	0.310 ppb
2013-09-16	2897733	0.280 ppb
2013-09-16	2897642	0.490 ppb
2013-09-16	2897634	0.440 ppb
2013-09-16	2897760	0.550 ppb
2013-09-16	2897638	0.510 ppb
2013-09-16	2897646	0.550 ppb
2013-09-16	2897654	0.380 ppb
2013-09-16	2897710	0.520 ppb
2013-09-16	2897692	0.420 ppb
2013-12-03	2939509	0.510 ppb
2013-12-03	2939514	0.110 ppb
2014-03-20	2995739	0.300 ppb
2014-03-20	2995833	0.580 ppb
2014-03-20	2997017	0.440 ppb
2014-09-23	3113388	0.500 ppb
2014-09-23	3113390	0.260 ppb
2014-09-23	3113383	0.280 ppb
2014-09-23	3113372	0.430 ppb
2014-09-23	3113392	0.280 ppb
2014-09-23	3113385	0.440 ppb
2014-09-23	3113377	0.430 ppb
2014-09-23	3113381	0.400 ppb
2014-09-23	3113374	0.370 ppb
2014-11-17	3140540	0.260 ppb
2014-11-17	3140544	0.370 ppb