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Dougall · 03-10-2010, 08:46 AM

City water has been treated with chemicals to inhibit organic growth. Rain water of course has not been treated. Your photos look like some type of calcium to me, however I don't know what it is. The best thing to do (I think) is to collect a sample and call around or use the Inet to find the best place to bring it.
Some municipality like the Board of Health or Sewage and Water will test it for you, that's what they do. It may be some kind of build up in your rain gutters.
Please let us know what you find out!

03-10-2010, 08:46 AM	#4
Dougall Avalon Senior Member Join Date: Dec 2009 Posts: 46	Re: Strange things in the rain... City water has been treated with chemicals to inhibit organic growth. Rain water of course has not been treated. Your photos look like some type of calcium to me, however I don't know what it is. The best thing to do (I think) is to collect a sample and call around or use the Inet to find the best place to bring it. Some municipality like the Board of Health or Sewage and Water will test it for you, that's what they do. It may be some kind of build up in your rain gutters. Please let us know what you find out!