Is there a lab you could send the rainwater in to be tested?
Is there a lab you could send the rainwater in to be tested?
Is there a lab you could send the rainwater in to be tested?
https://download.monin.net/f.php?h=1ISV2vy-&p=1
Cross reference that with your local weather reports from the last week and you should know, doesn't look like it at a glance to me, but I don't have the local weather reports.
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