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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
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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.

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