Depends on how you collect it, what you store it in, and who you are downwind of . . .
Main concern would be metals (like zinc and copper) and organics (like PAHs) from your roofing materials if you collect off your roof.
72g bowfront planted, CO2, 4x - T5HO, Eheim 2213 and 2217, 2 angels, pristella tetras, blue tetras, betta, albino bristlenose pleco, albino cories. Sword, vals, hygros, ludwigias, java moss and fern, anubias
2g Mac-quarium. Clown gravel, fluorescent plastic plants, and 2 guppies.