Stopped at 2:02. This bitch obviously doesn't have any idea what she's talking about. Yes there are minute amounts of drugs found in the water, but it's such a small part per million that it's not even relevant. Also, we're finding out about it now because we're able to detect an even smaller amount of w/e substance is in there than ever before.
tl;dr don't worry about it the amount is wayy to small to harm you.
Just for the record though I get purified water from a water store since the water here in Vegas isn't very clean and I dislike the taste.