Changes

*additional water filtration and treatment, depending on the intended use of the water.

*additional water filtration and treatment, depending on the intended use of the water.

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==Planning Considerations==

==Planning Considerations==

[[File:Overground RHW.jpg|thumb|An above-ground cistern. This system is not frost proof, and would have to be drained and closed during winter.]]

[[File:Overground RHW.jpg|thumb|An above-ground cistern. This system is not frost proof, and would have to be drained and closed during winter.]]

<em>RWH systems producing higher quality water will have additional maintenance requirements. These will depend on the the treatment technologies being used.</em>

<em>RWH systems producing higher quality water will have additional maintenance requirements. These will depend on the the treatment technologies being used.</em>

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==Design==

==Design==

[[File:RAINWATER HARVESTING TANK 550x550.jpg|thumb|Large cistern being installed underground]]

[[File:RAINWATER HARVESTING TANK 550x550.jpg|thumb|Large cistern being installed underground]]

These guides focus on ensuring that the rainwater does not contaminate or become mistaken for the municipal drinking water supply. Similarly, rainwater must be prevented from becoming contaminated from the sewer. In both cases, an air gap or a back-flow preventer is required.  

These guides focus on ensuring that the rainwater does not contaminate or become mistaken for the municipal drinking water supply. Similarly, rainwater must be prevented from becoming contaminated from the sewer. In both cases, an air gap or a back-flow preventer is required.  

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==Performance==

==Performance==

<h3>Water Quantity</h3>

<h3>Water Quantity</h3>

{{:Rainwater_harvesting:_Water_quality}}

{{:Rainwater_harvesting:_Water_quality}}

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==Incentives and Credits==

==Incentives and Credits==

<h3>In Ontario</h3>

<h3>In Ontario</h3>

A sliding scale awards between 1 point for 10% reduction to 10 points for 65% reduction.  

A sliding scale awards between 1 point for 10% reduction to 10 points for 65% reduction.  

Making this kind of water use reduction would typically require reuse of [[greywater]] as well as an optimized RWH plan.

Making this kind of water use reduction would typically require reuse of [[greywater]] as well as an optimized RWH plan.

==See Also==

==See Also==

*[[Rain Barrels|Rain Barrels]]

*[[Rain Barrels|Rain Barrels]]

==External Links==

==External Links==

{{:Rainwater harvesting: External links}}

{{:Rainwater harvesting: External links}}