A balance section sets what this site computed beside what the utility filed, so a reader who doubts a figure can check its terms.
The section, worked through one filing
| Filed line | MG |
|---|---|
| Volume from own sources | 1,000 |
| Billed metered | 850 |
| Unbilled metered | 20 |
| Unbilled unmetered | 10 |
| Unauthorized consumption | 5 |
| Customer metering inaccuracies | 12 |
| Systematic data handling errors | 3 |
| Computed cell | MG | Label |
|---|---|---|
| Water supplied | 1,000 | computed |
| Authorized consumption | 880 | computed |
| Revenue water | 850 | computed |
| Non-revenue water | 150 | computed |
| Water losses | 120 | computed |
| Apparent losses | 20 | computed |
| Real losses | 100 | computed |
Illustrative — names, dates and figures invented.
The supply lines a system does not have are stated zeros, and the section says who stated them. That is why water supplied is a computed cell here and not a copy of the first filed line.
Every cell says it was computed
No cell is presented as a figure the utility filed. The label belongs to the value and travels with it. Where one of a cell’s terms is a state default standing in for a measurement, the cell is labeled modeled, and the weakest term decides.
A missing line stops the cell
An absent line is not a zero. Where a filing does not publish one of the terms, the cell it feeds is left blank and the rest of the section still computes. Reading that blank as nothing would move the water into losses and raise every figure below it.
No leakage index appears in the section
The index divides real losses by what a system in good condition would lose anyway. The divisor takes length of mains, service connections, private service line length, and average operating pressure. The filed record behind these pages holds service connections. An index printed here would be a figure this site cannot compute, so the section prints none for any system.