Rainwater harvesting is an ancient technique enjoying a revival in popularity due to the inherent quality of rainwater and interest in reducing consumption of treated water.

• The end use of harvested water is located close to the source, eliminating the need for complex and costly distribution systems.

• Rainwater provides a water source when groundwater is unacceptable or unavailable, or it can augment limited groundwater supplies.

• The zero hardness of rainwater helps prevent scale on appliances, extending their use; rainwater eliminates the need for a water softener and the salts added during the softening process.

• Rainwater is sodium-free, important for persons on low-sodium diets.

• Rainwater is superior for landscape irrigation.

• Rainwater harvesting reduces flow to stormwater drains and also reduces non-point source pollution.

• Rainwater harvesting helps utilities reduce the summer demand peak and delays expansion of existing water treatment plants.

• Rainwater harvesting reduces consumers’ utility bills.

Basic Components

Regardless of the complexity of the system, the domestic rainwater harvesting system  comprises six basic components:

1. Catchment surface: the collection surface from which rainfall runs off
2. Gutters and downspouts: channel water from the roof to the tank
3. Leaf screens, first-flush diverters, and roof washers: components which remove debris and dust from the captured rainwater before it goes to the tank
4. One or more storage tanks, also called cisterns
5. Delivery system: gravity-fed or pumped to the end use
6. Treatment/purification: for potable systems, filters and other methods to make the water safe to drink

Considerations for the Rainwater Harvesting System Owner

Rainwater harvesting is one of the most promising alternatives for supplying water in the face of increasing water scarcity and escalating demand. The pressures on water supplies, greater environmental impact associated with new projects as well as deteriorating water quality in reservoirs already constructed, constrain the ability of communities to meet the demand for freshwater from traditional sources.

Rainwater harvesting presents an opportunity for augmentation of water supplies allowing for self-reliance and sustainability. Sustaining the environment contributes to the overall conservation of our precious natural resources.

For more information and a free estimate, Call 813-837-4219