There is plenty of untapped (sorry) capacity. From (unreliable) memory I think California captures maybe 10-20%. A quick googling gave this: https://www.latim

There is plenty of untapped (sorry) capacity. From (unreliable) memory I think California captures maybe 10-20%. A quick googling gave this: https://www.latimes.com/local/lanow/la-me-rainwater-lost-wet-winter-california-20190220-story.html https://www.latimes.com/local/lanow/la-me-rainwater-lost-wet...