Rainwater Harvesting


What is rainwater harvesting?


Simply put, rainwater harvesting is exactly what it sounds like: accumulating rainwater from surfaces on which it falls, and redirecting it into a place it can be stored for later reuse. Rainwater is most commonly collected from roofs, and a system is set up to filter out debris and particulates and run the water into a tank or reservoir. More and more countries are encouraging and incentivizing their citizens to collect rainwater in order to reduce the demand on the municipal water supply and amount of water contributed to storm runoff.

Why harvest rainwater?


Mismanagement, pollution, aging infrastructure, growing agricultural demands, and more are contributing to the rising scarcity of our potable water supply. This is why investing in conservation methods like rainwater harvesting is important. Harvesting rainwater reduces erosion, property flooding, and water contamination by eliminating the majority of runoff from businesses and homes. Additionally, rainwater is naturally soft and free of chemicals like chlorine, which makes it a great choice for plants, gardens, and landscapes. Replacing municipally supplied water for your harvested rainwater for even just a few of the uses below can significantly reduce your water bill and burden on the environment.

Uses for harvested rainwater:
  • Gardens
  • Landscaping
  • Irrigation
  • Livestock
  • Pool & Pond Filling
  • Toilet Flushing
  • Laundry Washing
  • Cooling Towers
  • Fire Suppression
  • Process Water
  • Street Cleaning
  • Building Washing
  • Vehicle Washing
  • Bathing*
  • Drinking Water*
  • Cooking*

*In order for harvested rainwater to be used for drinking, cooking, or bathing, it must first be made potable (see step 5 below).

How can I begin harvesting rainwater?


If you're now asking yourself this question, we are here to help! As members of The American Rainwater Catchment Systems Association (ARCSA), Fresh Water Systems promotes sustainable rainwater harvesting practices and offers the most state-of-the-art, cost-effective harvesting systems. We detail our 5 Step System plan and products below so you can be on your way to rainwater harvesting success! 

Pre-Tank Filters & Accessories: A downspout filter is an easy way to start a rainwater system. The Vortex, a world-class rainwater filter from WISY, flushes out all debris to the stormwater system, are diverts clean rainwater to the tank. »Learn More

Smoothing Inlets: These prevent incoming rainwater from stirring the tank and disrupting the beneficial biofilm layer that settles at the bottom of the tank. They also aerate harvested rainwater by directing the water upward and outward. »Learn More

Floating Filters: These act more as uptake points for the pump, taking water from just below the surface of the tank. Particulates will either sink or float, so collecting water at this depth ensures you get the highest quality water from your tank. »Learn More

Overflow Devices: Overflow devices have two jobs. The first is to act as overflow protection during heavy rains. The second is to keep the water surface in the tank clean. The angled opening enables it to skim the surface of buoyant debris, like pollen. »Learn More

Optional Post-Tank Filtration & Purification: In order for collected rainwater to be potable, it must go through a purification process. This can be achieved through using sediment filters, carbon filters, and UltraViolet disinfection units. »Learn More

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