Like @Nug-bug pointed out, in theory unless you live down hill from a leaking nuclear waste site or even an old dump or down hill of a pasture of farm animals or something it should be fine. What is the ph of the creek water when you test it?
Your plant looks good. I do see some spots on your lower leaves that look like they might be trying to tell you something? If they are old then no worries but if they are new and getting worse you might outta do a support ticket.
Welcome to ILGM. Just realized you’ve only been on for a few days! Hope you are enjoying all of the grow journals and such. there is a lot to read here. Always something new going on!