A good idea is to have the test repeated. If similar results are found then contact local officials to see if similar problems have been reported in your area, if not report what you have found. However, don't wait for local or state government to correct a potentially bad situation. There is very little water contamination that can't be corrected or eliminated at the point of use. There are countless filtering devices that can be purchased and installed at the incoming water supply that can remove contamination from bacteria to lead, mercury or PCB's, cleaning solvents or pesticides.
Most action taken by official agencies is often some form of filtration on a large scale.
In fact, some States have funded programs to help homeowners pay for correcting water problems once they have been documented, New Jersey for example. The point is to take control of your own environment. Lastly, we feel compelled to say something about bottled water. Many people feel that bottled water is the safe approach to take. Many bottled water companies do a fairly good job of pre-treating their water prior to sale.