Strontium

City of Chino

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
2014	0.388 ppb	10	10	0.320 ppb - 0.450 ppb
2015	0.371 ppb	18	18	0.280 ppb - 0.440 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
2014-10-30	201410300311AM	0.320 ppb
2014-10-30	201410300379AM	0.420 ppb
2014-10-30	201410300377AM	0.450 ppb
2014-10-30	201410300300AM	0.400 ppb
2014-10-30	201410300393AM	0.340 ppb
2014-10-30	201410300373AM	0.370 ppb
2014-10-30	201410300308AM	0.440 ppb
2014-10-30	201410300302AM	0.410 ppb
2014-10-30	201410300287AM	0.350 ppb
2014-10-30	201410300281AM	0.380 ppb
2015-01-27	201501270644AM	0.380 ppb
2015-01-27	201501270642AM	0.400 ppb
2015-01-29	201501290336AM	0.380 ppb
2015-01-29	201501290343AM	0.410 ppb
2015-04-29	201504290435AM	0.280 ppb
2015-04-29	201504290666AM	0.350 ppb
2015-04-29	201504290495AM	0.350 ppb
2015-04-29	201504290430AM	0.380 ppb
2015-04-29	201504290662AM	0.390 ppb
2015-04-29	201504290594AM	0.290 ppb
2015-04-29	201504290500AM	0.360 ppb
2015-04-29	201504290493AM	0.390 ppb
2015-04-29	201504290657AM	0.330 ppb
2015-04-29	201504290625AM	0.350 ppb
2015-07-23	201507230361AM	0.380 ppb
2015-07-23	201507230355AM	0.430 ppb
2015-07-23	201507230357AM	0.380 ppb
2015-07-23	201507230333AM	0.440 ppb