1. the water is
free; the only cost is for collection and use.
2.the end use of
harvested water is located close to the source, eliminating the need for
complex and costly distribution systems.
3. Rainwater
provides a water source when groundwater is unacceptable or unavailable, or it
can augment limited groundwater supplies.
4. 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.
5. Rainwater is
sodium-free, important for persons on low-sodium diets.
6. Rainwater is
superior for landscape irrigation.
7. Rainwater
harvesting reduces flow to storm water drains and also reduces non-point source
pollution.
8. Rainwater
harvesting helps utilities reduce the summer demand peak and delay expansion of
existing water treatment plants.
9. Rainwater
harvesting reduces consumers’ utility bills.