Using 1950's technology will ...

Using 1950's technology will certainly result in water loss. Too much time taken to measure the loss instead of either replacing old pipes or changing to current recycle technology. in a few words as possible.>collect rain water, use, store, build cistern,= to 2 years your water needs, biodigesters, biogenerators, save use pathogen and toxin free biomass for home garden, use solar, wind, bio energy with storage batteries  apx 2 years back up, Eliminate infrastructure, maintenance, taxes, reduced food needs, (green house for year round.

The question is similar to measuring how many stars in our own galaxy.  Impossible to do. If done no relevance.  Added advantage, no chlorine ever needed, no more dumping into rivers, lakes, ocean.  In case you were wondering.