How are you? Here is my proposal for your contest. I created an eye symbol representing inspections. The pupil is in the shape of a waterdrop. The combination of the waterdrop with the eye communicates sharp insight on the quality of pools/water.
The icon works well along with the name or as a stand alone graphic, one that will be easy remembered.
I look forward to your comments or thoughts. It would be my pleasure to work up any variations.