[Here's an article I wrote for a Texas water conservation publication that just got published last week.]
Due to an accidentally awesome real estate investment in our
first house, a small inheritance from grandpa, being DINKs (double income, no
kids), and a willingness to absorb massive amounts of debt (it’s the American
way…), my wife and I were fortunate enough to help design, build, and move into
a house last summer in north-central Austin. As you might have guessed, being a
serious water geek (What? You didn’t know?!?!), I spent quite a bit of time
researching, choosing, and installing fixtures and appliances to increase the
efficiency of water use in our home. On the behavioral side, I’ve also
experimented with water conservation on my spouse. Water savings have been
substantial, but spousal behavioral results have been mixed…
The average Texan uses 95 gallons of water per day at their
home. We are currently using 33 gallons of
water per person per day. We got there by choosing WaterSense fixtures for the
inside and not using city water outside. Getting there has been relatively
easy, but there have been some challenges along the way.
Based on work by the Texas Water Development Board, an
average Texan uses about 59 69 percent of their residential water inside. That
equates to 66 gallons per person per day. Although a lot of people focus on
reducing residential water use outdoors (and there’s nothing wrong with that…),
the primary use of water for an average Texan is indoors. That 33 gallons per
person per day that my wife and I achieved is half that of the average Texan, a
water savings that’s greater than what an average Texan uses outdoors over the
course of a year. And it was easy as peach pie to get there. All we did was
choose WaterSense-rated fixtures and appliances, items that use at least 20
percent less water than today’s federal fixture standards. The only indoor behavioral
change required was choosing which button to press when flushing a toilet, although
I would like us to be more efficient
in the shower.
Speaking about showers, I think a lot about our shower head.
It amply showers us with two gallons per minute. Our previous shower head at
our apartment used 1.5 gallons per minute through one emitter (it spat at us
like a hot sauce sipping monkey). Our current shower head has a Wall Street
worthy field of 66 emitters. You read that right: 66!!! Compared to our previous
monkey-spitting shower head, our current one is Niagara Falls. It’s hard to
believe it only uses two gallons per minute. One morning this spring, on the
way to a water meeting, I was thinking about our shower head again. At the
meeting, I wound up sitting next to the engineer who designed our shower head
(the world is truly a beautiful place!). He told me it took about two years to
design our shower head and assured me that, indeed, it only uses two gallons
per minute. I didn’t quite believe him. But when I did a bucket test, there it
was: two gallons after one minute, a miracle of motivated water conservation
engineering.
According to the U.S. Department of Energy, an average
American uses 17 percent of total indoor water use for showering, just behind
toilets (27 percent) and clothes washers (22 percent). With toilets and clothes
washing taken care of with efficient fixture choices, I’ve tried to increase
shower efficiency by encouraging the bride to take shorter showers. To help
things along, I picked up one of those TCEQ shower timers as an educational
tool with the incentive to “beat the heck out of TCEQ!” For some reason, that
shower timer goes unused or “disappears”. And my shower-based lectures on water
conservation seem to have worn thin. If she’s particularly agitated she’ll say
“You know how long my showers are when you are not here? Thirty minutes. Did
you hear that? T H I R T Y M I N U T E
S!!!! S O M E T I M E S L O N G E R!!!”
Ultimately, I’ve had to choose between (1) shorter spousal showers or (2)
cancelled conjugal visits with loud threats of bitterly expensive divorce
proceedings. As in many decisions, I made an economic one.
What we did outside required more dramatic behavioral changes.
We thoroughly xeriscaped our yard with natives and drought tolerant plants and
used lots of mulch and gravel. What little turf we have (9 percent of our yard,
about 750 square-feet) is drought tolerant (a billowing Aggie Zoysia in one
place; a scrawny buffalo grass mixture in another). We grow vegetables in a
series of wicking gardens, an efficient way to water-from-the-bottom to
minimize evaporative losses. We also have a massive, for an urbanite, rainwater
collection tank: 5,000 glorious gallons of cloud juice storage dedicated to outdoor
use. The plants love rainwater compared to city water, and the time we save by
not mowing grass or watering the garden leaves more time for arguing about
showering. Win-win!
My wife and I truly love to collect rainwater. We placed our
tank where we can see it from our living room (it’s gorgeous…), so whenever it
rains, we watch the float on that tank like hawks. However, sometimes it’s
painful to use the liquid gold we collect.
Me: “Honey! Why are you using city water to wash the picnic
table?!?!”
Honey: “I don’t want to waste the rainwater!!!”
As a friend pointed out, she may be taking a wider more
strategic position on water resources given how low the Highland Lakes are right
now. When designing the plumbing for the house, I asked for a central shut-off
valve to keep the outdoor fixtures from freezing during harsh winters. That
valve is also proving useful in discouraging the wife from using city water
outdoors (at least until she figures out where that valve is [or finds the
number for her divorce attorney…]).
So there you have it: We decreased indoor usage by half and total
usage of city water by two thirds by using WaterSense fixtures and no city
water outside. While decreasing our outdoor use required a great deal of effort
, cost, and behavioral modification, indoor savings were easy to obtain with
little behavioral changes (once I gave up on changing significant-other showering
habits). And most importantly, despite all the spousal experimentation, we’re
still married! However, writing this article makes me think we can go lower.
Anyone up for 25 gallons per capita per day?
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