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Disadvantages of Rainwater Harvesting


1)       Limited and uncertain local rainfall.

2)       Can be costly to install – rainwater storage and delivery systems can cost between $200 to $2,000+ depending on the size and sophistication of the system.

3)       The payback period varies depending on the size of storage and complexity of the system .

4)       Can take considerable amount of time to “pay for itself” .

5)       Requires some technical skills to install and provide regular maintenance.

6)       If not installed correctly, may attract mosquitoes (i.e.; West Nile Disease and other waterborne illnesses) .

7)       Certain roof types may seep chemicals, pesticides, and other pollutants into the water that can harm the plants.

8)      Rainwater collected during the first rain season is generally not needed by plants until the dry season. Once catchment is full, cannot take advantage of future rains.

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