Man Installs 20,000 Gallon Rainwater Harvesting System in Backyard
by Derek Markham in Saving Water
Many of us living in dry areas work to try to save our precious rainwater, but a California man is taking it to the extreme with his backyard rainwater harvesting system, capable of collecting and holding up to 20,000 gallons each year. His goal is to be able to store enough water during the rainy season to completely irrigate the crops he grows for himself and his wife on his one acre lot.
Jerry Block, of Monte Sereno, CA, a retired anesthesiologist, had the system installed with components by Rain Harvesting Systems and Gutterglove, with four huge tanks to hold the water and a sophisticated gutter system to collect it, spending about $29,000 on the project.

Rainwater Harvesting System
“We sized our system according to how much water we’d need to grow enough trees, fruits and vegetables for two people. We get about 15 inches of rain, and we live on an acre of land, so that works out to about 20,000 gallons of irrigation water per year.” – Block
Block is only using his rainwater harvest to irrigate fruits and vegetables, not for consumption, but says a filtering system for the water could be built fairly inexpensively, and using the gray water for toilet flushing is another possibility he hasn’t implemented yet.
According to Block, his actions have “deep geo-political ramifications” because water is tied to energy production, and by being less dependent on water infrastructure, our dependency on foreign oil decreases.
“I see this as a patriotic act.” – Block
According to estimates from the EPA, an average American family of four uses about 400 gallons a day, so Block’s system could supply water for a typical family’s usage for 50 days at that rate. However, UNICEF estimates that a person could survive on a 5 gallon per day ration, so a 20,000 gallon tank has the potential to support 10 to 11 people for an entire year.
[Via MNN, LA Times, photo Robert Lenney]
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Posted on Sep 15, 2009
Jerry Block, rainwater harvesting, residential rainwater harvesting, water catchment
12 Responses to “Man Installs 20,000 Gallon Rainwater Harvesting System in Backyard”
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Anti Vigilante
Sep 15, 2009
THE AVERAGE AMERICAN FAMILY DOES NOT USE 400 GALLONS A DAY.
WHAT KINDA KOOKERY IS THIS?
BLI Editors
Sep 18, 2009
Municipal water planners actually use a figure of 100-150 gallons per person per day, so 400 isn’t even the top average estimate in some circles. It does of course vary by area, but those are unfortunately the currently estimated/generally accepted figures. Google “family water usage day average” if you want further confirmation.
– Eds
Jeremy
Sep 19, 2009
For indoor use, the average American uses about 50 gallons per day. However, if we add irrigation water to this estimate, it can indeed be nearly 100-150 gallons per day per person.
Did you know that only 1% of the water treated to drinking water standards is actually consumed internally by people? I believe that in the near future, irrigating with purified drinking water from municipal grids will be highly restricted if not completely outlawed (especially in the driest climates).
pirizfelipe
Sep 22, 2009
para el que este interesado, les voy a dar una primicia. tengo confeccionado la maquina que puede generar agua en cualquier lugar del planeta…. solo necesito una ayuda para construirla en escala y mas moderna..les escibro desde ARGENTINA.. CUNA DE MENTES INVENTORAS..
Uncle B
Twitter: @Twitter Name (optional)
Oct 16, 2009
Great Stuff! Thank you Sir for caring! off-gridders the world over know that educated, science backed, technology assisted systems and methods will eventually reward us with an Off-Grid lifestyle superior to the current realities! Once totally liberated from the lower of Maslow’s concerns, we can go about resolving, in intelligent fashion, without military force in most cases, the problems besetting mankind all these millenia! Corrupt psycho-consumerism by the masses in America has polluted the Earth, and other nations copy this folly! We must set a better example, through endeavors such as yours, and expose them on the net if possible, and especially to the larger, English, Asian audience there, to resolve mankind’s greatest dilemmas, and move on even to communication to those perhaps beyond this earth and the stars! Peace on Earth first! and planned DNA controlled parenthood for all! A new world is dawning! The true Age of Aquarius is upon us! The fourth turning for America , well underway! and war will be banished, intelligent design to reign! You, Sir, and your effort in your garden a harbinger of what is to come! Thank you again!
waterfilterreview
Oct 30, 2009
The man definitely knows what he wants. It is this kind of outside the box thinking that gets the most criticism.
Bottom line, he’s storing enough water during the rainy season to completely irrigate the crops he grows for himself and his wife…what could possibly be wrong with that?
Mike
Oct 31, 2009
Our family has been using a similar system since 1994. I it was built in the early 1980s by a previous owner. It collects rainwater from the house and barn roofs, collecting in a small 1200 gal cistern, and then is pumped up the hill to 110,000 gal poured concrete tank, then flows back down hill to give us (admittedly low) water pressure. The water is used for all purposes, including drinking. The house has comp shingle roofing, the barn metal roofing, standard galv and plastic gutters and downspouts are used. Using sediment and taste filters, we have not had a problem with quality. If the taste filter is removed, the water can taste like smoke from the fire. We don’t usually use the filters.
Waterfilterreview asked what could be wrong with this, in concept, nothing. In California and many other states, all ground water belongs to the state, and in some places collecting rain water can be illegal. We should not let this level of regulation come to pass!
Keith
Dec 22, 2009
We’ve been saving our rainwater for years so I’m glad to hear of others doing it. I’ve built three 10,000 gallon tanks and 4 others 5000 gallons or less out of ferrocement. The latest tank has a root cellar attached. You can see pix at my blog
on the right hand sidebar http://kjpermaculture.blogspot.com/
More people should do this!
charlie slavin
Jan 07, 2010
save some water for the greater community of life…