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The Cistern's One-Time Dollar Price for Storage Capacity calculator computes the one-time use metric for the cost of water in a cistern were it used only once.
INSTRUCTIONS: Choose units and enter the following:
- (pc) Cistern Cost
- (sc) Cistern Capacity
Cistern's One-Time Dollar Price for Storage Capacity (OTC): The results the cost in dollars per gallon. However, these can be automatically converted to compatible units via the pull-down menu.
The Math / Science
The Cistern's One-Time Dollar Price for Storage Capacity calculates the price of the storage container (or what is referred to as a "cistern") per gallon of rainwater saved.
Example:
A tank holds 1,420 gallons of water, and would cost around $1500 to purchase and install.
$1,500 ÷ 1,420 gal = $1.06/gal
$1.06/gal = price of storage capacity
Resources:
- Lancaster, Brad, and Joe Marshall. Rainwater Harvesting for Drylands. Vol. 1. Tucson, AZ: Rainsource, 2006. Print.
