System Leak Rate Calculator

Calculate non-revenue water, Infrastructure Leakage Index, and compare against AWWA benchmarks.

Total water produced or purchased entering the distribution system.
MGD
Metered billed consumption (residential + commercial + industrial).
MGD
Flushing, firefighting, parks, municipal buildings (authorized but unmetered/unbilled).
MGD
Total length of distribution mains for ILI calculation.
miles
Number of service connections for UARL calculation.
Average operating pressure in the distribution system.
psi

Results

Non-Revenue Water (NRW)-MGD
NRW Percentage-%
Real Losses (est.)-MGD
Real Losses per Connection-gal/conn/day
Infrastructure Leakage Index-
AWWA Rating-
Reference: AWWA M36 Water Audits. IWA/AWWA ILI methodology. UARL = (18*Lm + 0.8*Nc + 25*Lc) * P / 1440.