Strontium
Clearwater Water System
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.
18
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.370 ppb | 7 | 7 | 0.200 ppb - 0.490 ppb |
| 2014 | 0.280 ppb | 10 | 10 | 0.0890 ppb - 0.430 ppb |
| 2015 | 0.0830 ppb | 1 | 1 | 0.0830 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 | Result |
|---|---|
| 2013-12-06 | 0.270 ppb |
| 2013-12-10 | 0.330 ppb |
| 2013-12-11 | 0.350 ppb |
| 2013-12-16 | 0.480 ppb |
| 2013-12-16 | 0.490 ppb |
| 2013-12-17 | 0.200 ppb |
| 2013-12-18 | 0.470 ppb |
| 2014-03-18 | 0.300 ppb |
| 2014-03-18 | 0.420 ppb |
| 2014-06-23 | 0.250 ppb |
| 2014-06-23 | 0.160 ppb |
| 2014-06-23 | 0.320 ppb |
| 2014-06-24 | 0.340 ppb |
| 2014-06-24 | 0.0890 ppb |
| 2014-06-24 | 0.320 ppb |
| 2014-09-24 | 0.430 ppb |
| 2014-10-09 | 0.170 ppb |
| 2015-08-05 | 0.0830 ppb |