As you look through some of the filters offered by manufacturers in the portable water filter market, you will find a wide range of different styles and more importantly, qualities of filters. Make sure you check carefully the documentation that the filter manufacturer provides relating to the type of filter and the test results. If you are provided with test results on your filter, you must make sure that these tests were performed by EPA-approved labs in the United States. If the tests were performed on the water filter outside the US (Mexico, Canada, South Africa) then the test results are worthless. Outside the US, it is very simple to pay a company to give you the “test results” you want. In the US, our regulations are much more difficult to fake.
When you are looking at your water bottle filter, make sure that you take these kinds of things into account when you are looking.