Strontium

City of Friendswood

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	0.342 ppb	30	30	0.256 ppb - 1.04 ppb
2014	0.240 ppb	2	2	0.235 ppb - 0.244 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
2013-05-01	1305094-001A	0.319 ppb
2013-05-01	1305094-009A	0.339 ppb
2013-05-01	1305094-011A	0.296 ppb
2013-05-01	1305094-027A	0.318 ppb
2013-05-01	1305094-003A	0.312 ppb
2013-05-01	1305094-007A	0.271 ppb
2013-05-01	1305094-005A	0.278 ppb
2013-05-01	1305094-025A	0.312 ppb
2013-05-01	1305094-023A	0.311 ppb
2013-05-01	1305094-015A	0.310 ppb
2013-05-01	1305094-021A	0.307 ppb
2013-05-01	1305094-017A	0.310 ppb
2013-05-01	1305094-019A	0.304 ppb
2013-05-01	1305094-013A	1.04 ppb
2013-08-22	Q1306099001	0.312 ppb
2013-08-28	Q1306099003	0.320 ppb
2013-11-14	Q1313371026	0.274 ppb
2013-11-14	Q1313371019	0.278 ppb
2013-11-14	Q1313371017	0.274 ppb
2013-11-14	Q1313371021	0.279 ppb
2013-11-14	Q1313371022	0.281 ppb
2013-11-14	Q1313371024	0.280 ppb
2013-11-14	Q1313371007	0.260 ppb
2013-11-14	Q1313371011	0.282 ppb
2013-11-14	Q1313371009	0.348 ppb
2013-11-14	Q1313371003	0.256 ppb
2013-11-14	Q1313371013	0.960 ppb
2013-11-14	Q1313371005	0.258 ppb
2013-11-14	Q1313371001	0.296 ppb
2013-11-14	Q1313371015	0.287 ppb
2014-02-18	Q1404903001	0.235 ppb
2014-02-18	Q1404903003	0.244 ppb