Strontium

City of Petaluma

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	0.307 ppb	12	12	0.170 ppb - 0.630 ppb
2014	0.274 ppb	12	12	0.160 ppb - 0.560 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
2013-07-10	A3F1369-11A	0.360 ppb
2013-07-10	A3F1369-07A	0.630 ppb
2013-07-10	A3F1369-05A	0.170 ppb
2013-07-10	A3F1369-01A	0.520 ppb
2013-07-10	A3F1369-03A	0.290 ppb
2013-07-10	A3F1369-21A	0.210 ppb
2013-07-10	A3F1369-19A	0.210 ppb
2013-07-10	A3F1369-15A	0.210 ppb
2013-07-10	A3F1369-23A	0.300 ppb
2013-07-10	A3F1369-17A	0.230 ppb
2013-07-10	A3F1369-09A	0.330 ppb
2013-07-10	A3F1369-13A	0.220 ppb
2014-01-21	A3L1893-17A	0.190 ppb
2014-01-21	A3L1893-19A	0.190 ppb
2014-01-21	A3L1893-13A	0.190 ppb
2014-01-21	A3L1893-21A	0.190 ppb
2014-01-21	A3L1893-23A	0.190 ppb
2014-01-21	A3L1893-15A	0.190 ppb
2014-01-21	A3L1893-03A	0.350 ppb
2014-01-21	A3L1893-09A	0.270 ppb
2014-01-21	A3L1893-01A	0.490 ppb
2014-01-21	A3L1893-07A	0.560 ppb
2014-01-21	A3L1893-11A	0.320 ppb
2014-01-21	A3L1893-05A	0.160 ppb