You might want to talk with the health department. They should be able to tell you what testing they run and what labs they use for more extensive testing. Are you doing the testing for coliform bacteria or are you worried about chemical contamination?
Fortunately I'm not worried about any contamination! The test is required for some paperwork we're doing. I was just hoping that someone had a recommendation of someone they know would be quick and reliable!
"Our greatest glory is not in never falling, but in rising every time we fall." - Confucious