Strontium
Castle Rock
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.
20
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 |
|---|---|---|---|---|
| 2014 | 0.422 ppb | 10 | 10 | 0.360 ppb - 0.500 ppb |
| 2015 | 0.431 ppb | 10 | 10 | 0.360 ppb - 0.490 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 |
|---|---|
| 2014-08-13 | 0.390 ppb |
| 2014-08-13 | 0.400 ppb |
| 2014-08-14 | 0.360 ppb |
| 2014-08-14 | 0.480 ppb |
| 2014-08-14 | 0.390 ppb |
| 2014-08-14 | 0.500 ppb |
| 2014-09-02 | 0.400 ppb |
| 2014-09-02 | 0.420 ppb |
| 2014-12-16 | 0.420 ppb |
| 2014-12-16 | 0.460 ppb |
| 2015-02-11 | 0.460 ppb |
| 2015-02-11 | 0.440 ppb |
| 2015-02-11 | 0.390 ppb |
| 2015-02-11 | 0.470 ppb |
| 2015-05-19 | 0.420 ppb |
| 2015-05-19 | 0.400 ppb |
| 2015-08-18 | 0.400 ppb |
| 2015-08-18 | 0.490 ppb |
| 2015-08-18 | 0.360 ppb |
| 2015-08-18 | 0.480 ppb |