Converted IBCs, in fact (see Rain Collection post). Each holds about 250 gallons, and eventually we plan to have six around the house and garage, including a “double” on the northwest corner to feed a vegetable washing station (details pending).
With all the rain we’ve had, they filled up pretty quickly!
How long does your rain water last with no new rain?
Do you use it for everything?
How is it treated?
We’ve had so much rain lately that we haven’t had to use it much for watering, so we don’t know how long it will last, but we have used it for other things — rinsing veggies, tools, etc. — and it seems to last forever. It’s not treated (straight run-off from the gutters), so we’ll be using it solely for those purposes (not drinking). I may use it to wash my car, as well!