10 Reasons To Harvest Rainwater

1. Rainwater is delivered to us free of charge, eliminating the need for costly distribution systems. Did you know that 20% of all energy consumed in California is used to transport, treat or store water?
2. Rainwater is the highest-quality source of irrigation water.
3. Rain water is salt-free and can help flush plant damaging salts from the root zone in alkaline soils.
4. Rainwater is a natural fertilizer containing sulfur, beneficial microorganisms, mineral nutrients, and nitrogen.
5. Rainwater harvesting helps reduce utility bills.
6. Rainwater harvesting reduces flooding by reducing flow to streets and storm drains.
7. Rainwater harvesting reduces nonpoint-source pollution of stormwater.
8. Rainwater harvesting provides a water source when well, surface, or municipal water is contaminated or unreliable (such as after a major earthquake)
9. Water harvesting helps utilities reduce summer peak demands for water and reduces the volume of wastewater that needs to be treated at water treatment plants.
   
10. Water harvesting is fun! The food from my garden tastes better than store bought food and we have emergency water storage.
    

List from http://www.sandiegoreader.com/weblogs/mysterious-math-about-rainwater-harvesting/2013/apr/01/rainwater-harvesting-the-math/#