I'd be skeptical of that spring, too! So much depends on the local geology and then what people are doing on the land. A good, clean spring is so special. But I bet your spring is still nice to look at. So cool that you have a spring at your place!
Thanks for the heads up about your garlic mustard! I'll go check it out! I don't see it here. I was in St. Paul, MN in May last year and saw it all over the place. What a problem!
I love having Crystal Spring in my yard! In 1893 water from the spring was entered into a competition at the Chicago Worlds Fair and it won first place for best tasting water. My well water comes from the same water source as the spring, so I guess really, I am drinking it!