Strontium
Golden State Water Company (GSWC) - South San Gabriel
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.350 ppb | 7 | 7 | 0.200 ppb - 0.950 ppb |
2014 | 0.491 ppb | 11 | 11 | 0.210 ppb - 1.10 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 |
---|---|---|
2013-12-18 | 3L19004-01A | 0.220 ppb |
2013-12-18 | 3L19004-07A | 0.950 ppb |
2013-12-18 | 3L19004-13A | 0.290 ppb |
2013-12-18 | 3L19004-11A | 0.200 ppb |
2013-12-18 | 3L19004-05A | 0.290 ppb |
2013-12-18 | 3L19004-09A | 0.300 ppb |
2013-12-18 | 3L19004-03A | 0.200 ppb |
2014-03-18 | 4C18022-01A | 0.940 ppb |
2014-03-18 | 4C18022-03A | 0.310 ppb |
2014-06-24 | 4F24036-03A | 1.10 ppb |
2014-06-24 | 4F24036-07A | 0.310 ppb |
2014-06-24 | 4F24036-01A | 0.220 ppb |
2014-06-24 | 4F24036-05A | 0.210 ppb |
2014-06-30 | 4F30035-01A | 0.320 ppb |
2014-06-30 | 4F30035-03A | 0.330 ppb |
2014-09-24 | 4I24014-03A | 0.320 ppb |
2014-09-24 | 4I24014-01A | 1.10 ppb |
2014-09-30 | 4I30020-01A | 0.240 ppb |