Strontium

Clear Lake City Water Authority

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	0.271 ppb	36	36	0.161 ppb - 0.341 ppb
2014	0.258 ppb	8	8	0.146 ppb - 0.284 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
2013-04-09	713556-8826	0.291 ppb
2013-04-09	713558-8826	0.256 ppb
2013-04-09	713550-8826	0.275 ppb
2013-04-09	713532-8810	0.259 ppb
2013-04-09	713536-8810	0.264 ppb
2013-04-09	713562-8930	0.289 ppb
2013-04-09	713554-8826	0.244 ppb
2013-04-09	713534-8810	0.264 ppb
2013-04-09	713552-8826	0.295 ppb
2013-04-09	713548-8826	0.251 ppb
2013-04-09	713546-8826	0.276 ppb
2013-04-09	713560-8826	0.302 ppb
2013-04-09	713544-8826	0.294 ppb
2013-04-09	713542-8826	0.170 ppb
2013-07-10	730565-9319	0.328 ppb
2013-07-10	730567-9319	0.319 ppb
2013-07-10	730571-9319	0.336 ppb
2013-07-10	730569-9319	0.326 ppb
2013-07-10	730591-9319	0.341 ppb
2013-07-10	730595-9319	0.317 ppb
2013-07-10	730585-9319	0.333 ppb
2013-07-10	730593-9319	0.319 ppb
2013-10-08	751296-9977	0.252 ppb
2013-10-08	751275-9977	0.253 ppb
2013-10-08	751367-10041	0.230 ppb
2013-10-08	751267-9977	0.248 ppb
2013-10-08	751308-9977	0.246 ppb
2013-10-08	751283-9977	0.264 ppb
2013-10-08	751306-9977	0.265 ppb
2013-10-08	751262-9977	0.191 ppb
2013-10-08	751248-9977	0.248 ppb
2013-10-08	751244-9977	0.243 ppb
2013-10-08	751242-9977	0.257 ppb
2013-10-08	751246-9977	0.270 ppb
2013-10-22	754854-10200	0.161 ppb
2013-11-13	758960-10320	0.285 ppb
2014-01-08	765736-10554	0.265 ppb
2014-01-08	765714-10553	0.275 ppb
2014-01-08	765704-10553	0.284 ppb
2014-01-08	765710-10553	0.272 ppb
2014-01-08	765706-10553	0.271 ppb
2014-01-08	765708-10553	0.279 ppb
2014-01-08	765716-10553	0.276 ppb
2014-02-26	772741-10837	0.146 ppb