Toilet Flushing with Harvested Rainwater in Wyoming

Using harvested rainwater for toilet flushing in Wyoming is a practical way to reduce your water bill and conserve municipal supplies. With 12.9 inches of average annual rainfall, a 1,500-square-foot asphalt shingle roof in Wyoming can collect approximately 8,748 gal per year. toilet flushing requires roughly 20 gallons per day per person, year-round. With this setup, rainwater can meet approximately 59.9% of your toilet flushing needs, saving an estimated $43.74 per year.

Annual Harvest 8,748 gal 1,500 sq ft roof
Annual Demand 14,600 gal toilet flushing (2 people)
Demand Met 59.9% of toilet flushing
Rec. Tank 275 gal storage capacity

Monthly Supply vs. Demand for Toilet Flushing in Wyoming

The table below shows how your monthly rainwater harvest compares to toilet flushing demand throughout the year. Green values indicate months where your harvest exceeds demand (surplus water for tank storage), while red values show months where you will draw down your stored reserves. Toilet Flushing is a year-round use, so demand remains constant regardless of season. Tank sizing should bridge the gap during your driest months.

Month Harvest (gal) Demand (gal) Balance
January 299 1,240 -941
February 299 1,120 -821
March 598 1,240 -642
April 1,047 1,200 -153
May 1,495 1,240 +255
June 1,196 1,200 -4
July 897 1,240 -343
August 673 1,240 -567
September 748 1,200 -452
October 673 1,240 -567
November 449 1,200 -751
December 374 1,240 -866

Harvest by Roof Size for Toilet Flushing

A larger roof collection area directly increases your harvest and the percentage of toilet flushing demand you can meet with rainwater. The table below shows how different roof sizes perform in Wyoming for toilet flushing (calculated for 2 people).

Roof Area Annual Harvest Demand Met Rec. Tank Savings/Year
1,000 sq ft 5,831 gal 39.9% 55 gal $29.16
1,500 sq ft 8,748 gal 59.9% 275 gal $43.74
2,000 sq ft 11,663 gal 79.9% 1,000 gal $58.32
2,500 sq ft 14,577 gal 99.8% 1,500 gal $72.89

Setting Up Rainwater Harvesting for Toilet Flushing in Wyoming

Connecting rainwater to your toilets in Wyoming requires a dedicated non-potable plumbing line (typically purple-colored pipe to distinguish it from potable supply). This is best planned during new construction or major renovation, though retrofit kits are available. The system includes a storage tank, submersible pump, pressure tank, sediment filter, and a backup connection to municipal water with an air gap to prevent cross-contamination. Most jurisdictions in Wyoming require a plumbing permit for this type of installation. The payoff is substantial — toilet flushing accounts for roughly 30% of indoor water use, and switching to rainwater for this purpose provides year-round savings regardless of season. The recommended tank size for toilet flushing should bridge at least your driest month, ensuring continuous supply.

Metal Roof Upgrade: Toilet Flushing in Wyoming

Upgrading to a metal roof increases your collection efficiency from 80% (asphalt shingle) to 95%, boosting your annual harvest to 10,387 gal from a 1,500-square-foot roof. This increases your toilet flushing demand coverage to 71.1% and raises annual savings to $51.94. Metal roofs also last 40-70 years compared to 20-30 years for asphalt shingle, and their smooth surface sheds debris more effectively, reducing maintenance on your collection system and improving water quality.

Other Uses for Rainwater in Wyoming

Explore how harvested rainwater can serve other needs in Wyoming:

Get Your Custom Estimate

Use our Rainwater Harvesting Calculator to enter your exact roof area, material, and combine multiple uses for a comprehensive harvest analysis. See all rainwater harvesting data for Wyoming or compare all 50 states.