greywater is wastewater from residential sinks,
showers, bathtubs and laundry. it is distinct from
toilet and kitchen sink wastewater, known as
blackwater. greywater is generally 50 to 80% of a
household's waste stream.
in america greywater is typically considered waste
and routed to sewer systems and septic tanks
along with blackwater.
greywater can however be reclaimed for a second
use, usually landscape irrigation. the benefits of
this are many: reduced consumption of water,
conservation of aquatic ecosystems, reduced load
on septic tanks and municipal sewer systems,
recharging your local water-table, saving money,
and lowering overall energy usage.
irrigating with greywater will lower your water
bill; most installations pay for themselves within a
greywater basics PDF Sheet
"greywater gardening" ebook