Strontium
Helena 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.
19
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 | 0.147 ppb | 10 | 9 | ND - 0.228 ppb |
| 2014 | 0.112 ppb | 9 | 8 | ND - 0.220 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 |
|---|---|---|
| 2013-07-08 | 729681-9294 | 0.228 ppb |
| 2013-07-08 | 729689-9294 | 0.158 ppb |
| 2013-07-08 | 729687-9294 | 0.224 ppb |
| 2013-07-08 | 729683-9294 | 0.225 ppb |
| 2013-07-08 | 729691-9294 | 0.0641 ppb |
| 2013-07-08 | 729685-9294 | 0.159 ppb |
| 2013-10-02 | 750326-9960 | 0.227 ppb |
| 2013-10-02 | 750319-9960 | 0.0969 ppb |
| 2013-10-02 | 750321-9960 | ND |
| 2013-10-02 | 750328-9960 | 0.0856 ppb |
| 2014-01-16 | 766872-10638 | 0.151 ppb |
| 2014-01-16 | 766870-10638 | 0.106 ppb |
| 2014-01-16 | 766880-10638 | 0.157 ppb |
| 2014-01-16 | 766882-10638 | 0.0952 ppb |
| 2014-01-16 | 766878-10638 | ND |
| 2014-04-16 | 781014-11225 | 0.0855 ppb |
| 2014-04-16 | 781018-11225 | 0.0873 ppb |
| 2014-04-16 | 781020-11225 | 0.102 ppb |
| 2014-04-16 | 781016-11225 | 0.220 ppb |