For Homeowners in Knoxville, Nashville, Asheville, Chattanooga, and Lexington

The Ultimate Guide to Rainwater Harvesting

This guide contains everything you need to know about rainwater harvesting for your home.

What is Rainwater Harvesting?

Rainwater harvesting is a process that allows you to catch your own water in the form of natural rainfall and involves advanced water catchment technology and high-capacity storage tanks and continues through purification, making the water useable for any purpose in the home such as drinking, cooking, and washing. From the rooftop to your faucet, rainwater harvesting is a complete water source for your home.

Overview of Rainwater Harvesting

Want to learn what rainwater harvesting is and what it’s not? This collection of articles covers how rainwater harvesting works, the history or rainwater harvesting, and everything Knoxville and Nashville homeowners and home builders need to know about rainwater harvesting.

No more Retainer Pond

Keys to a Successful Rainwater Harvesting System

Creating an effective rainwater system requires a complete understanding of the environment in and around the home, current Tennessee laws and regulations, and the latest equipment available.


Common Uses for Rainwater Harvesting Systems

Rainwater harvesting has many applications in commercial and residential settings, including drinking water, Irrigation, fire suppression, and manufacturing processes.

Find additional resources from American Rainwater Catchment Systems Association (PerfectWater is a member of this industry group.)

Rainwater Harvesting Gallery

Whole House Potable Water

The goal of this project was to capture rainwater as the primary water supply for the Lowrance family.

Primary Water Supply

The goal of this project was to capture rainwater as the sole-source water supply for drinking, washing, bathing, and cooking.

Whole House Potable Water

When considering rainwater harvesting as the primary source of water, the homeowner wanted to be sure that quality of life wouldn’t change.

Benefits of Rainwater Harvesting

Water Availability

Rainwater harvesting is your own personal water supply. If municipal water is not available, issues arise with well water sources, or if you simply wish to utilize this abundant resource, rainwater harvesting is a strongly recommended solution.


Rainwater harvesting can make your home 100% self-sustainable if you want to be off the grid.

Stormwater Runoff

The challenges and cost of compliance with stormwater regulations can be significantly reduced by capturing rooftop rainwater.

Water Quality

Rainwater is the best natural water supply in the world. It's straight from nature's big distiller in the sky; naturally soft and tastes great. Use as primary water supply for indoor potable use and irrigation.

Water Cost

Rainwater is yours. You own it. It is an asset that falls on to your roof at no cost to you after initial investment. Low cost annual service is part of maintaining a successful system.


Consider your impact on the collective freshwater supply in your community. Positive community environmental impact.

Knoxville, TN | Nashville, TN | Asheville, NC | Chattanooga, TN | Lexington, KY