We ahve limestone quarries her in Ky and the water has a kind of sweet taste to it as opposed to a metallic taste. If someone tries the clorox test that Hank49 mentioned it would be interesting to here the results.Jay_SMART_Diver:Sounds kind've like the Blue Lagoon outside Huntsville. It's an old limestone Quarry and the water is very alkaline and had a funny metallic taste. Sounds similar, what kind of quarry was it?