Environment, Sustainability

Why Water Lifecycle Matters


Close-up of a worn, metallic fountain pen nib on a black surface.An informative, fun and interactive diagram jointly developed by The U.S. Geological Survey (USGS) and the Food and Agriculture Organization of the United Nations (FAO) outlines an easy to follow water-cycle diagram for schools.

RainBank has previously discussed this phenomenon, in anarticle from May 2015:

The continual movement of rainfall from the bodies of water, land, and the atmosphere is part of thehydrologic cycle.

The cycle starts with condensation. When water vapor condenses in the atmosphere it forms clouds, when the condensation becomes too heavy rain is formed and the clouds release the rain.

Diagram showing water cycle stages including evaporation, transpiration, precipitation, and groundwater flow.When rainfall reaches the surface it infiltrates into the soil, becoming groundwater. The infiltrated groundwater recharges our aquifers, rivers and lakes. Water that runs off the surface is referred to as stormwater. Water is returned to the atmosphere through evaporation by the sun heating the water, changing it to a gas and it rises into the atmosphere and becomes vapor again.

Depending on soil conditions, the movement of stormwater across the surface can cause erosion and also carry pollutants into our bodies of water. This is why stormwater management is so important. Stormwater management practices such as infiltration, or collection, slow down the process of surface water runoff and helps keep erosion to a minimum. Much of the pollutants associated with stormwater runoff are not carried to our larger bodies of water – keeping our natural environment healthy.

It is important to have a basic understanding of water’s lifecycle in order to fully capture the meaning of why rainwater collection is so important to having a sustainable future.

Rainwater Harvesting Education, Sustainability

Sustainability Key Rainwater Harvesting Benefit


Close-up of a worn, metallic fountain pen nib on a black surface.

Colorado needs to look no further than Seattle and Washington State for the sustainability benefits of Rainwater harvesting.

The Colorado rainwater harvesting narrativeshows that as time marches forward, some laws that were passed almost one hundred years ago should be reconsideredbecause they are just no longer practical. Sustainability wasn’t a factorback then, but it sure needs to be part of the equation now.

In October 2009–after years of argument–the state of Washingtonofficially declared thatpeople could collect and store rainwater captured from a rooftop or other “guzzler” system without a water right, as long as it is used on site and essentially isn’t hurting anybody else. San Juan County was the only one that allowed rainwater collection and potable use for single family residence as an exemption to the water rights issuebefore the 2009 decision.

Since then, King County recognized thebenefits of rainwater collection in January 2011 for householdusage, with support from State Department of Agriculture. So now, King County Department of Health not only allows, butencourages rainwater collection.

Commercial, private, andcommunities all are findingbenefits to rainwater collection and the positive effects on the environment of the Pacific Northwest and our water supplies. The Washington State Department of Ecology continues to support rainwatercollection and studies the effects of in stream flow rates (Skagit) and salmon habitat.

All Washington State counties allow for rooftop collection for non-potable use, with some allowing for potable use. Non-potable use includes irrigation, toilet facility, laundry,wash down and others that are not intended for consumption or bathing. Commercial applications are directing roof runoff to irrigation and toilet facilities, rather than having this runoff enter our bodies of water withpollutants picked upalong the way.Households are not only using rainwater for non-potable use, but are having systems installed that treat and disinfect therainwater to potable standards that aresuperior to city drinking water, thus conserving water by simply not allowing it to become runoff. Ruralhouseholds are using rainwater collection that benefits aquifers by rainwater collection and household use, through infiltration after use.Communities areorganizing communal gardeningapplying rainwater collection, removing the strain on small water systems, while promoting communityevolvementand education.

We congratulate Colorado on its progress in exploring new (to them) sustainability methods. We welcome Colorado’s steps towards better understanding of thebenefits that we in WashingtonState currently enjoy.

Residential Rainwater Collection

Colorado Legalizes Residential Rainwater Collection


Close-up of a worn, metallic fountain pen nib on a black surface.Until May 12, 2016, it was illegal for a Colorado resident to capture rainwater from his or her roof for any reason, not even to water plants or a garden.

A step in the right direction, Gov. John Hickenlooper signed House Bill 1005 into law that allows for the limited harvesting of rainwater. The law takes effect on August 20, 2016. The issue of water collection has been a hot topic for years; other attempts to make residential rainwater collection legal have failed in the state legislature. Why? Businesses in the agriculture industry and other water rights holders feared that there wouldn’t be enough runoff for their use.

Why now? According to Pueblo Rep. Daneya Esgar, in a quote from a story from CBS Denver, “We just want to make sure we’re not the only state in the union where this is illegal. I think that’s why it gained so much national attention, even international attention”.

Now, residents can collect rainwater – but with limits. The law allows for harvesting of up to 110 gallons and the collected water must be returned to the homeowner’s property – perhaps to water a garden or wash a car. However, the only way the law could be passed without pushback from the agriculture industry, was to include a provision that if farmers and ranchers can prove thatas a result of the new law, there is not enough water for their use, the number of barrels allowed could be reduced.

There are different restrictions, depending on the type of residence you have. Colorado State University has written guidelines on how and how much rainwater you can collect if you are a Colorado resident and Colorado State UniversityExtensionhas developed afact sheetwith additional details on rainwater harvesting.

How do RainBank’s readers feel about this law? We value your feedback. Leave a comment with your thoughts about the new Colorado law allowing limited residential rainwater collection.

Rainwater Systems