Theory 201/Water networks/Ratio lens
Non-Revenue Water Is Loss Against Supply
The claim
The fraction of non-revenue water is set by the ratio of leakage to total supply, so a network's apparent efficiency depends on how much it supplies.
01Mechanism
Leakage is roughly absolute while supply varies; the ratio determines the reported loss.
02Prediction
Loss fraction should track the ratio.
03Refutation
Loss fraction tracking leak volume would remove supply.