I use my parents well water, 8 ft into water table, and naturally filtered by sand, but close to a two fork river. Much better than mine at 35 feet and full of nitrates. But after reading this I worry about my parents old plumbing. Should I just go buy water conditioner at store or go up the mountain to a natural flowing spring that emerges at 1,000 ft elevation. (pretty high for wisconsin) Locals have used this water forever. Both the spring and my parents water I've tested for nitates in the past both are nitrate free. Are old pipes as dangerous as bad water?