RAINWATER HARVESTING STATS AND TABLES

On this page you will find tables and stats relating to rainwater harvesting systems.

AVERAGE RAINFALL CHARTS

| Location | Precipitation(mm) | | --------------------------------------|:------------------| | Charlottetown, P.E.I. | 1,173 | | Edmonton, Alberta | 482 | | Fredericton, New Brunswick | 1,143 | | Halifax, Nova Scotia | 1,452 | | Iqaluit, Nunavut | 412 | | Ottawa, Ontario | 943 | | Quebec City, Quebec | 1,230 | | Regina, Saskatchewan | 388 | | St. John's, Newfoundland and Labrador | 1,513 | | Toronto, Ontario | 792 | | Victoria, British Columbia | 883 | | Whitehorse, Yukon | 267 | | Winnipeg, Manitoba | 513 | | Yellowknife, Northwest Territories | 280 |

RAINWATER TANK SIZING CHARTS

How do I use these charts to choose the optimum rainwater tank?

Follow the instructions below:

  1. Find the column that is closest to the number of square meters of roof area for your rainwater catchment surface.
  2. Find the row that is closest to the number of litres of rainwater that will be used per-day. Irrigation, Toilets & Laundry, Potable, or all uses.
  3. Find the intersection of the chosen column and row to find the liters of rainwater storage that will be the ideal rainwater cistern size.

Chart for Ontario & Quebec

Median Rainfall (mm): 678 | Days of rainfall: 182 | Total Usable Rainfall(mm): 620

Chart for British Columbia

Median Rainfall (mm): 1,102 | Days of rainfall: 287 | Total Usable Rainfall(mm): 1,011

Chart for Prairies

Median Rainfall (mm): 346 | Days of rainfall: 108 | Total Usable Rainfall(mm): 315

Chart for Maritimes

Median Rainfall (mm): 1,156 | Days of rainfall: 279 | Total Usable Rainfall(mm): 1,043