I don't understand the distinction you are trying to make. You are expressing shock at "[p]rivately hosted rooftop water tanks", then talking about privately-h

I don't understand the distinction you are trying to make. You are expressing shock at "[p]rivately hosted rooftop water tanks", then talking about privately-hosted hydrofoors instead. The rooftop tanks are supposed to be inspected annually by the city as well, but the inspections aren't happening. I don't see how the situation would be any better with this hydrofoor. Just as note as well, in US cities the government generally is the water company, so we don't have the multiple layers you describe. There is some oversight of lower levels of government by higher levels, but that tends to be more auditory than inspectitory.