Category Archives: Residential Rainwater Collection

Who Owns the Clouds?

storm-730653_640Scenario: you finally come to the awareness that collecting rainwater is a good way to conserve well or city water and a sustainable way to water your garden. So, you set up a barrel to capture rain for use in plant watering. Great idea – right? Wrong. If you live in Colorado, where someone else owns the clouds, you might just be an outlaw!

An excerpt from a New York Times article, A Thirsty Colorado Is Battling Over Who Owns Raindrops, states: “When Jason Story bought an old soy sauce barrel to collect the rain dripping from his downspout, he figured he had found an environmentally friendly way to water his garden’s beets and spinach. But under the quirks of Western water rules, where raindrops are claimed even as they tumble from the sky, he became a water outlaw.”

While water supply has always been limited in the Western US, it’s an even more precious commodity now, as marathon drought has plagued the region for years.

Sustainability has become a wide-reaching message, as individuals and businesses seek ways to conserve water – for without it, we couldn’t survive. However, in Colorado, collecting rain in a barrel, for your own use, is pretty much illegal due to ancient laws that create a system of water rights – meaning it’s not yours – you can’t have it – even if it falls from the clouds onto your own property, because someone else has already claimed it.

Some lawmakers saw this as an antiquated rule and, in the spring of 2015 attempted to make a change, allowing homeowners to collect rainwater on their own properties. But, some with their own personal and commercial interests, stepped in to squash it – one legislator categorized personal rainwater collection as “stealing”.

So far, the law, which could generate fines of up to $500 to an individual, has been largely unenforced. The question is, as rainwater collection becomes more popular in the mainstream, what will happen if more folks in Colorado choose to harvest rain?

Can I Collect Drinking Water From My Roof in Seattle?

seattle-skylineDoes Seattle allow rainwater collected from the roof to be used for drinking water?

You can have a potable rainwater collection system designed by an engineer, licensed in the state of Washington with experience in RWC, or an ARCSA (American Rainwater Catchment Systems Association) accredited professional. Knowledge and experience are required for potable design in King County. A properly designed filtration and disinfection system can provide quality drinking water. It is the designer and installer’s responsibility to ensure that an adequate system is in place and correctly installed.

After system install has been completed, it is up to the owner or operator to maintain the system to protect users from possible contaminants. Sampling and testing are essential to ensure the system is performing as designed. It is recommended that filtered, disinfected rainwater should be tested annually.

A typical filtration/ disinfection system consists of a sediment filter, activated carbon, and ultra violet light and is adequate for achieving potable standards. Adding a 1-micron absolute sediment filter before the UV adds a higher level of endurance of cyst removal. Other possible contaminants can be identified by testing “raw water” before the filtration train and then can be removed by additional filtration.  The last device should be an ultra violet light, which must carry a “class A” rating.

Quality drinking water is possible with rainwater collection and is legal in many counties in Washington State, including Seattle. Many are finding the alternative appealing to municipal water supplies, while also helping to reduce stormwater runoff. Seattle Public Health encourages the practice of rainwater collection, as does Washington State Department of Ecology.

Rainwater Collection in Baring, Outside of Seattle

Baring WAYou don’t get much more rural in King County than Baring, WA. With no community water available, being concerned with the impact of drilling a well, and the desire to have a clean, safe reliable source of water, RainBank’s customer chose rainwater collection for their sole source of water for their remodel.

The job had its challenges, but in the end, this compact 885 square foot cabin is able to collect enough water for whole house, potable demand. Historically, this area’s annual rainfall has been 42.5″ allowing for 23,432 gallons to be collected.

The 9′ wide, 20,000 lb. GVWR, wooden suspension bridge allowed only one tank at a time for crossing. Delivery of start up water due to a summer install required two water trucks to be used, one on each side of the bridge. One truck brought water from Skykomish and transferred water across the bridge to the other, to be delivered to the cisterns to stay below the weight restriction of the bridge. The bridge’s weight restrictions allowed only for a small excavator to be brought across for excavation for tank placement. The home was so close to the Skykomish river, rocks larger than the excavator were encountered and needed to be navigated around for tank location. Our excavation contractor was awesome!

The filtration and pump room below the house was limited in size for the filtration train and, with winter temperatures well below freezing, along with limitations of excavation, it was decided that the sump tank needed to be placed in the small room as well. (See slides of job below.)

All of these concerns were recognized early on in the project by RainBank’s team and challenges were met, resulting in a very clean 10,000-gallon install. Whole house, potable use from rainwater collection will now provide this cabin with safe, clean, reliable water for years to come with no negative impact on the environment.

“Job well done guys” exclaims Ken Blair to his crew.

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