Here's what he says:
Now that I live in a place where water is so scarce, I’m doing some preliminary research on people’s perception of water quality, and how that impacts the amount of water they use. One specific area of interest is in whether (and why) people prefer bottled water vs. tap water. If you have a few moments, I’d appreciate it if you could complete the survey. Here it is.It takes about 7 minutes and there are no trick questions. He's trying to get a wide range of respondents so pass it along.