Safe Exposure Levels

There are a variety of contaminants that can be found in water (including chemical contaminants, such as lead and organic compounds, and microbial contaminants, such as bacteria and viruses), many of which have the potential to cause detrimental health problems when consumed. It is therefore extremely important that we have access to drinking water that is assured to contain little or no contamination.

The World Health Organization (WHO) has published a number of reports outlining what constitutes a safe level for particular contaminants often found in drinking water. These quantities have all been calculated from an abundance of scientific research and are subject to amendment should further research change the current view. In addition to this, they also outline how testing should be performed to determine that water produced by water filters is of an acceptable standard for consumption.


Testing of our products is completed to NSF Standards, these are derived from WHO recommendations and typically specify influent contaminate values far higher than is suggested by WHO as safe consumption levels. This is to ensure that our filters are working to a high standard regardless of where they may be used. Our results consistently show that not only is our filtered water at a safe contaminant level, but also that we often far exceed what would be considered minimum safe levels.

Coldstream product testing is carried out by an independent laboratory and their results show our filters to be the most effective at removing contaminants found in water supplies around the world. Our filter systems have even been proven to outperform many reverse osmosis systems.