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Not at all.

For instance, in the forests around where I live, there's very high lead levels in certain brooks and ground water reservoirs because of an old shooting range out there where no one ever bothered to clean up the slugs left behind.

Where is this?

In CA, giardia is a big concern.

There's generally nowhere on Earth where it's safe to drink from moving freshwater because of a lack of evidence (testing) and probable contamination upstream from wildlife. If you were dying of thirst, then sure, take a chance on C. parvum, V. cholerae, and G. duodenalis with glamping toys.

99.997% of doctors agree that it's the .03% that get you.