Home Rain / Stormwater

Rainwater Harvesting (RWH) Defined

Rainwater Harvesting (RWH) is the practice of capturing, infiltrating or utilizing rainfall from roofs, constructed catchment surfaces, and driveways, sidewalks, parking lots and streets.

RWH is an effective water conservation strategy in urban and rural areas around the globe, decreasing unnecessary use of heavily treated drinking water for landscaping, toilet flushing, and laundry washing (if legal in your area). With proper filtration, rainwater can also serve for potable water uses. End use and local laws determine the level of filtration and corresponding water quality necessary.

WhollyH2O covers a broad range of outdoor landscape approaches for capturing and infiltrating rainfall onsite, including rain gardens, bio-retention, and low impact development (LID).

Additional Information on Rainwater Harvesting

Rebates and Incentives
side-monthly_feature-0310

Collection Potential

Roof/Catchment Area:
(sq ft)

Average Annual Rainfall:
(inches)

Gallons on average that you can expect to harvest:

Annual Rainfall

Find the annual rainfall in your city.

side-products_services

CALIFORNIA WATER EVENTS

Regional Water Board Meeting
Wed Sep 08 @09:00AM
Elihu M. Harris Building, First Floor Auditorium, 1515 Clay Street, Oakland, CA 94612
Fundamentals of Grey Water Systems for Sustainable and Integrated Water Management - New Webinar
Mon Sep 13 @11:30AM
Webinar
Wholly H2o September Forum: Establishiing Baseline Water Use, Audits, Benchmarking
Mon Sep 13 @07:00PM
Jellyfish Gallery, 1286 Folsom (at Ninth St.) San Francisco, CA 94103 (corner of 9th and Folsom, Civic Center Bart)
Early Detection Monitoring for Quagga & Zebra Mussels
Tue Sep 14 @08:00AM
EBMUD San Pablo Bay Reservoir ,7301 San Pablo Dam Road, San Pablo, CA
Theoretical and practical approaches for event detection and alarm reduction in water treatment
Wed Sep 15 @11:30AM
Webinar