If your home is served by a water system, get a copy of your annual water quality report before you test your water. This report will tell you what contaminants have been found in your drinking water and at what level. After you’ve read this report, you may wish to test for specific contaminants (such as lead) that can vary from house to house, or any other contaminant you’re concerned about. EPA does not test individual homes, and cannot recommend specific laboratories to test your drinking water. States certify water testing laboratories and will be able to point you towards the laboratories more approximate to your location. You may call your state certification officer to get a list of certified laboratories in your state.
A list of EPA-certified laboratories for drinking water testing is available per state.