So, like many people in North Carolina, I've been getting pretty crazy with my attempts to save water. Most things I'm doing are pretty typical -- including catching the water I have to run off to clear the lines for hot water, using the cutoff valve on my shower head, and all that. One experiment I tried this weekend was to take my 22 quart canner and set it on top of the washing machine, then pull out the drain hose out of the fixture in the wall (funny thing if you've never done this -- your washer drain hose typically just sits loosely stuck down a PVC pipe hole, without any threading or anything) and hung it over the side. Then, as I ran a load of clothes in my super water efficient front loading machine, I just bailed the "grey water" out of it as the machine ran, and took it outside and put it on my plants.
Now, I did first check to make sure that the detergent I was using wasn't going to be horrible for my plants. Granted, it's probably not great, but most of the soils in my yard are the typical red or grey ultisols that are typical of the area, although the area around the bog garden is significantly more alluvial. (Sorry, geeking out again...) These are the kinds of soils you typically put lime on to raise the pH, so adding some organic bases in the form of BioPac laundry detergent might even help break up the clay a bit. In some ways, I was a little alarmed at just how much water was coming out of the drain, even on my water efficient model. I had to bail rather quickly, particularly after the wash cycle, to keep up. However, I ended up being able to give my younger trees and a few of the herbs I'm trying to keep alive until next year a good healthy dousing.
It wasn't until afterwards, when I was thinking about how I might be able to install a full grey water system on my house and doing some Googling on such, that I realized that I was breaking the law. Grey water can be a public health hazard, particularly when it's spread on the surface. The primary concern is water from kitchen sinks, dishwashers, and showers, which can contain high amounts of organic solids and can lead to the spread of dangerous bacteria. (Toilet water is considered "black water," and is, of course, right out.) Some states have adopted regulations for installing grey water treatment systems, but North Carolina isn't one of them.
Granted, I don't think the police will be showing up at my door any time soon. Washing machine water, from what I can tell, is one of the least dangerous forms of grey water, and given that I'm pretty certain absolutely none of it is going to make it past all of the incredibly thirsty plants and into my ditch, where my bog garden would suck up anything that was left, I'm probably okay. But as we all rush to find ways to conserve water, sometimes we trip over regulations we never realized were there.
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