Why Test Your Water? There is no such thing in nature as “pure” water. Nearly all water contains contaminants, even in the absence of nearby pollution-causing activities. Many dissolved minerals, organic carbon compounds, and microbes find their way into your drinking water as water comes into contact with air and soil. When pollutant and contaminant levels in drinking water are excessively high, they may affect certain household routines and/or be detrimental to human health.water quality Obvious water problems, such as staining of plumbing fixtures and laundry, as well as many objectionable tastes and odors, may be evidence of excessive levels of contaminants in your household water supply. Many of these contaminants are naturally occurring and are considered more of a nuisance than hazard, presenting no danger to a persons health. The presence of most harmful contaminants, however, is not always obvious and such contaminated water may not cause health-related symptoms for many years. As a result, the only way that you can ensure that your water supply is safe is to have a periodic laboratory water analysis done on your drinking water.