The Aqua Pure water filter corporation states that you should test your existing water supply before you purchase any water filter, so that you can decide what your needs of your household will be. For example, filters that remove organic compounds may not be capable in removing heavy metal compounds. Process of a nine-point examination is usually necessary to determine what your household’s water purification needs are.
These water tests use a sample of your water, and a special test strip is inserted in it. After the test, the color of the strip is placed against a color chart, which tells the tester what toxins or impurities might exist in your water.