A month-by-month water budget shows exactly when your supply falls short — and how much storage you need to bridge the gap.
British Columbia gets enormous winter rainfall — and almost nothing from July through September. Annual totals can look generous, but they hide a brutal seasonal mismatch. A garden, a household, or a herd of cattle cannot wait for November. The question is not how much rain you get, but when you get it and where it goes.
A monthly water budget maps your supply against your demand across all twelve months. It reveals the exact month your cumulative surplus runs out, the depth of your deficit, and the storage volume needed to bridge the gap. This is the first step in the sequence: slow it, spread it, sink it, store it, share it. You cannot size storage until you know the deficit. Enter your property details below.
Where your water comes from: rainfall captured by roof and land surfaces.
Total roof footprint collecting rain
Current tanks, cisterns, or other storage capacity
Where your water goes: household, garden, and livestock use.
BC average 200-300 L/day
| Month | Supply (L) | Demand (L) | Balance (L) | Cumulative (L) |
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Use our other tools to size specific components, or get in touch for a site visit.