Trickle-Down Theory

Stop—don't flush away your precious bodily fluids!

"IF IT'S YELLOW, LET IT MELLOW." The old water conservation slogan is partly right: Toilets are the single biggest consumers of indoor household water, using some 64,000 gallons a second across the United States. But even the mellowest, yellowest commode will eventually send a valuable resource down the drain. Not water—urine.

Nutrient rich and superabundant, urine is a top-rate fertilizer. One person's yearly output contains enough nutrients to fertilize up to a tenth of an acre of fruits and veggies. Which is why not everybody sends it to the sewer. For more than a decade, 130 households in Stockholm, Sweden, have collected their urine—nearly 40,000 gallons of it per year—and trucked it off to be sprayed on crops. More than 600,000 Chinese households in at least 17 provinces use special urine-diverting toilets to fertilize crops such as sugarcane, watermelons, and peanuts. Farming communities in 17 African countries have also taken up the practice of collecting urine. And in the central Mexican village of Tepoztlán, an environmental group wheels a urine-collecting porta-potty to fiestas and uses the cache on local fields.

For obvious logistical and gross-out reasons, pooling America's urine has yet to catch on. There are also concerns about the pharmaceuticals in our pee. But when diluted, your own output is safe enough to use in a home garden. For those who are ready to stop flushing, Carol Steinfeld, author of Liquid Gold: The Lore and Logic of Using Urine to Grow Plants, proposes a new slogan: "Urine Charge."


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collecting urine

There's really not much of a "gross-out" factor to collecting urine, which I've done off and on for several years now, and my vegetable garden seems happy with the arrangement. Since I no longer take pharmaceuticals, I don't have to worry about drugging the groundwater inadvertently. I just collect it in a receptacle that fits between me and the toilet, pour it into saved milk jugs with the aid of a funnel, rinse the receptacle and pour that water through the funnel to rise it, cap the bottle and, once it's full, take it out to the garden and further dilute before applying to the garden. It's also useful to "ignite" a woody compost pile that needs more nitrogen.

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Jeanmarine, I am planning to

Jeanmarine,
I am planning to start producing compost in large scale, so I'd like to know whether it's possible to use urine instead of water. I say this because water provision is scarce in the place where I plan to make the compost. What if I dilute the urine with some water. What would the ratio of water versus urine be? Since I would collect the urine from a large segment of the population, I couldn't control the "pharmaceutical" content of some of the urine. However, since I plan to add microorganisms to clean the traces of pesticides and chemicals, would this also fix the problem of the pharmaceuticals?
I appreciate your answer.

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I have been using urine on

I have been using urine on my garden and compost pile for over a year, with excellent results. Collect it in a bottle or carton with a cap and dilute it between 5:1 and 10:1 with water if using it on plants. Pour it diluted or undiluted on the compost pile. Eat a low-sodium diet and be sure to use it on a well-drained compost pile or soil to minimize odors and maximize nitrogen recovery. I cannot smell it 10 seconds after pouring it on the soil as long as it does not pool on top. The book by Carol Steinfeld is an excellent one that covers all the basics.

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