The Pros and Cons of a Rainwater Harvesting System

Posted by Josie 25/05/2017 0 Comment(s) Irrigation Products,Wells and Boreholes,

A Well or Borehole is the Ultimate Rainwater Harvesting System

Weighing Up the Pros and Cons of a Rainwater Harvesting System


We are all keen to make use of rainwater which naturally falls onto our properties, rather than seeing it simply being flushed to waste, so here are the pros and cons to carefully consider, so that you can make an informed choice. 


A simple internet search will bring up the same results:



Low Maintenance Costs  -  Lower Water Bills  -  Great for Irrigation  -  Reduces Ground Water Demand  -  Reduces Soil Erosion and Floods  -  Multi Purpose.



High Energy Maintenance -  High starting costs  -  Chemical roof seepage is harmful to plants  -  Storage limits  -  Unreliable rainfall


However, we feel there are a few other points which should be considered and some of these contradicting the Pros.

  • If you want to use the Rainwater Harvesting System for flushing of toilets, then water treatment equipment is required thereby increasing running costs and maintenance time.
  • If not installed correctly a Rainwater Harvesting System can flood causing both flooding and soil erosion.
  • If filling up with mains water, your water bills will increase.
  • Rainwater Harvesting Systems do reduce ground water demand to some degree, however, rainwater falling onto the ground naturally percolates into the ground strata replenishing groundwater.
  • Rainwater Harvesting Systems rely on pumps to distribute the water and these incur running and maintenance costs.
  • In times of low rainfall, the Rainwater Harvesting System could be standing idle. 
  • During times of heavy rainfall, they overfill and flush out to waste. 
  • More importantly you will not want to be irrigating if it is raining.
  • The rainwater harvesting system requires regular maintenance to prevent the build up of rodents, insects and algae.  They need to be cleaned out to avoid creating a breeding ground for bacteria.  Hence the need for pre-filters and Ultraviolet Systems.


We consider that a well or borehole is the Ultimate Rainwater Harvesting System as groundwater is naturally replenished during any rainfall.  Water is available on demand without the need of having to wait for rainfall to fill up systems.


If the well or borehole is going to be used for garden irrigation, then no form of water treatment is required.  If, however, if you would like to use the water for both garden and domestic household use, then we would recommend having a Daro Ultraviolet Water Disinfection System installed to ensure that the water supply is bacteria free.


We hope this blog will assist you in making an informed choice and please feel free to contact us with any questions you may have.  We hope you will agree that a well or borehole is indeed the Ultimate Rainwater Harvesting System.

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