One common disadvantage of springs and wells is the occasional high concentrations of carbon dioxide and nitrogen gas that can result in gas super saturation. Both gases are easily removed through intense agitation. Under some circumstances the five other sources listed are acceptable. Selecting any source without first determining its quality is very risky. Most water quality tests are very simple to use and inexpensive.
Many private laboratories can conduct analyses for routine water quality parameters.
Tests kits may also be purchased to determine the concentrations of dissolved oxygen, carbon dioxide, nitrite, nitrate, ammonia, hardness, and alkalinity. Prices of tests kits may range from inexpensive aquaria kits to more expensive battery operated meters. The accuracy of these kits usually increses with price. Determining the presence of pesticides or heavy metals can be very expensive if a comprehensive analysis is requested. More specific analysis should be done if there is an indication that other contaminates are present.