Watering with rainwater: some questions

[JKeys]

Hello there,

I've switched to rainwater for some of my plants, and I'm just wondering - when I collect from certain "runoff" locations (for example, water collects much more under the edge of the roof than in the middle of the deck) there tends to be some dirt/sediment in the water. It is not rust, maybe just dirt collected as the water moves across the rooftop. Is it ok to water with this, or should I collect from an area where there are no sediments, like out in the open?

Thanks!