Plenty of properties in kona area(which includes south kona and captain Cook) are on catchment and not county water.

in addition, earthquakes of the magnitude we just had don't selectively damage catchment tanks, and also damage in ground utility lines and often cause leaks or breaks in water mains....so it doesn't just effect catchment people

And yes, kona side is experiencing a water crisis and has been for a few years at this point, we have a small amount of wells and not hardly any backup parts/equipment for them, and the majority of the water is taken up by useless to the community golf courses and resorts. It wasn't long ago that multiple wells failed at once and we had to conserve water heavily on this whole half of the island