How can I assess the water pollution in the rivers in the US?

Upvote:1

There does seem to be a product category for exactly this.

For example

https://www.simplexhealth.co.uk/product/aquarium-fresh-water-5-in-1-50-strips/

https://www.simplexhealth.co.uk/how-to-test-the-quality-of-open-water-for-bathing-or-swimmingis/

Notice the section,

"Recommended Tests for Open Water Swimming:" / then / "field test kits which provide instant results (these are suitable for fresh water only and are screening tests)" ...

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