Kapoho petri pools

[MarkP]

I don't think an island wide sewer system is necessarily a step up. If you are not going to maintain it there will be spills that cause just as much damage as faulty cesspools. We have this problem all across the country including in Waikiki. Most of the big island is too sparsely populated to make a central system economically possible, not to mention trying to dig through lava to lay the sewer lines.

There is a parallel with catchment systems. They can be built so they work safely, or you can put a kiddie pool in the front yard and dig a hole in the back yard.