All posts by Ken Blair

A rainwater collection systems designer and consultant, Ken has designed and installed residential and commercial systems, primarily in the northwest United States for more than 10 years and, in 2014, began consulting and managing builds in other states. Ken is an accredited ARCSA Professional Designer / Installer and Life Member, the Northwest Regional ARCSA representative and advisor to its education committee and is available to speak about Rainwater Collection Systems design and builds. Ken is a United States Navy veteran, having served on active duty during the Vietnam War era. A career entrepreneur, Ken created a new business focus with a commercial dive company in Hawaii in the mid 1980′s to respond to and clean up oil spills, oil spill equipment training, service and maintenance for the oil co-op service industry. Ken is passionate about having a positive impact on the environment and is also a founding director of BANK-ON-RAIN (2011-2014), whose mission is to create grassroots solutions for rainwater collection for consumption and agriculture in developing areas of the planet.
Rainwater Catchment

Planning a Rainwater Collection System

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Steel Tank Residential_watermarkedWhen planning a rainwater collection system, consideration of annual, monthly, intensity and frequency of rainfall must be taken into account. Precipitation information is generally available by most counties, state climatologists, the National Oceanographic and Atmospheric, Administration (NOAA) and the National Climatic Data Center.

Rainfall amounts in a given location can vary from month to month as well as intensity and frequency. Precipitation reports typically include snow as well as rainfall amounts. A history of rainfall amounts with consideration of a 50 or even a 100 year event are often required by the permitting agency to control overflow and runoff.

Rainfall intensity is measured in inches of rain per hour (IPH). Rainfall intensity will determine the choice of collection components and storage amounts. Although “first flush devices” are widely promoted by permitting agencies and some designers, they may not be the best option. If a given location has a low IPH, a first flush device may not be the best method of pre filtration upstream of storage.

Rainfall frequency can be obtained by a local climatologist and taken into consideration of storage and conveyance. Frequency of rainfall for a given area will help determine storage, as well as pipe size used for conveyance.

Rainfall return period is the historical data of a rainfall in a given location. While not a representation a specific time period, a return period determines the probability of an equal event in a given time. In other words an event of a 2-year return period has a 50% chance of occurring in any 1 year period.

Lastly, a maximum amount of dry days is critical in the design of a successful rainwater collection system. An historical account of dry periods is essential in determining storage capacities to get through the dry months.

Careful review of local rainfall data in determining size of storage, conveyance, and components is essential in a successful rainwater collection system.

Rainwater Catchment

Animas River Toxic Spill Poses Serious Health Risks

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animas-river-pollutionThe August 5th Animas River spill is now delivering serious health risks to three states – Colorado, New Mexico and Utah. Our recent blog post details how the orange colored, contaminated water could be seen working its way toward New Mexico and now, today, the U.S. Environmental Protection Agency announced that “surface-water testing revealed very high levels of lead, arsenic, cadmium and other heavy metals as a sickly-yellow plume of mine waste flowed through Colorado.”

The AP story further reports, “Over the long term, these metals can seep into the surrounding water table, potentially polluting drinking wells. The EPA has offered free water testing for homeowners with wells close to the river, but it’s unclear how long that offer stands.”

CBS News reports “Toxicologists say those people who live along the Animas River could be ingesting the contaminated water in any number of ways, such as drinking it or showering in it.”

As we talk about heavy metals being released into our waterways, the keyword here is HEAVY. While some will flow and be naturally flushed away, a great risk is that toxins will sink to the bottom and remain in the water, continuing to contaminate even after the yellow color dissipates and the water begins to appear to be normal.

In its article Rainwater Harvesting Can Create Safe, Decentralized Water Supplies, The American Rainwater Catchment Systems Association (ARCSA) reports, “A well-designed, installed and maintained rainwater harvesting system can provide significant amounts of high-quality water for potable and non-potable, residential and commercial use. Even in the arid Four Corners area of this spill, ample water can be harvested.”

It’s time for all states to begin allowing rainwater collection for potable and non-potable use, so individuals and businesses can harvest water for their own health and well being.

Animas River Pollution Photo courtesy of Snopes

Rainwater Catchment, Rainwater Harvesting Education

When Will Your County Adopt Rainwater Collection for Potable Use? 

LowWaterPuyallupRiver potableSnohomish County has over 1,000 water districts that are close to drying up, which ramps up the need to purchase potable water from the city of Everett.  Spada Lake is dangerously low, which jeopardizes water availability for fighting fires

Pierce County faces a similar issue – small water districts are running out of supply, forcing the potential for needing to purchase water from the city of Tacoma. The Center for Urban Waters, led by the University of Washington Tacoma, promotes rainwater collection, while some of the districts are not fully supportive of the concept.

Is it time for both of these counties to adopt RWC for potable use?

Snohomish County is surrounded by other counties that have expanded RWC to include potable usage. These counties recognize that potable use of rainwater for single-family dwellings is not a threat to public safety or to the revenue of their water districts. King, Skagit, Whatcom, San Juan, Jefferson, and Island counties all accept the benefits of potable RWC for single-family dwellings.

RainBank Rainwater Systems along with support from the American Rainwater Catchment Systems Association (ARCSA) will continue to educate these two counties as well as others by offering seminars, workshops, and general discussion on the benefits of RWC to motivate them to allow potable usage of rainwater.

Please watch the recently aired KIRO News report about small water districts that are running out of water.

Photo courtesy of King.