At a minimum, drinking water should be tested every year or so. DEQ has developed a guideline to provide basic information to well owners interested in testing their drinking water wells. Find a laboratory.
Testing more than once a year may be warranted in special situations:
-There are unexplained illnesses in the family,
-Someone in your household is pregnant or nursing,
-You note a change in water taste, odor, color or clarity,
-There is a spill of chemicals or fuels into or near your well,
-Your neighbors find a contaminant in their water.
The laboratory you choose should provide specific sampling instructions and clean bottles to collect the water sample. Carefully follow instructions for taking samples. Sampling is the most important part of testing. A carelessly collected sample can give you inaccurate results. Check with individual laboratories to get prices. Ask how soon you should expect results and about the information that will be provided with the test results. A good lab should help you interpret the results and make sense of the scientific data.
The important question is whether a contaminant poses a health threat. Compare your water test results to the
Water Well Problems and Treatment
Wellowner.org (National Ground Water Assoc.)
Water Well Protection Fact Sheets
Sources of Contamination
Siting New Wells
Setbacks for Water Wells
Plugging Abandoned Wells