Water Demand Forecasting Calculator
Forecast future water demand based on population growth, per capita usage, and peak factors. Estimates required storage capacity.
Inputs
AWWA M1: residential 80–100 gpd; total system 100–150 gpd; arid western US up to 200 gpd
AWWA M1: small system PHF 3.0–4.0; medium 2.0–3.0; large 1.5–2.5
Results
Average Daily Demand
7.43 MGD
Max Daily Demand
11.15 MGD
Required Storage
5.14 MG
How to Use This Calculator
- Enter current population, annual growth rate (%), and per-capita water demand (gpd).
- Set projection period in years.
- Review projected demand at 10, 20, and 30 years for infrastructure planning.
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