Lawn Watering in Texas with Greywater

Subject: Watering a lawn in Texas with greywater
Date: Wed, 20 Sep 2000 09:32:31 -0700
From: Art Ludwig

Bruce writes:
> We live in Cedar Hill, Texas. Every year we have a
> drought. Right now it has been over 80 days since we
> last had any rain. For 2 months we watered our lawn with
> sprinklers. The cost was well over $100 per month just
> for water. We would like to separate our 'gray' water
> from the 'black' water and collect the grey water to be
> used in connection with a yet-to-be-installed sprinkler
> system. We figured if we can collect and use that water
> we will be able to keep our lawn alive and green and
> still be conserving water. I have looked and looked for
> information on how to do this. Until I found your site I
> had no luck. Our house is about 1400 sf, built on pier
> and beam foundation. It is a 2 bedroom 2 bath house with
> a septic system. We have an old septic tank on our
> property that has not been used for over 16 years.
> I don't know what else to tell you. Can you help us?Bruce,

The only way to water a lawn safely with greywater is via
subsurface drip. The only system I know of which *might* be
able to do this is the "earthstar" from http://www.realgoods.com/
This is a copy of a system which proved itself in the
field.
If the septic tank is perfectly water-tight, you could pre-
filter the greywater by running it through the tank. If you
want a consultation on the collection plumbing I could help
you out. Create an Oasis with Grey Water (book) and the
Builder's Grey Water Guide (book) would provide useful
information as well.
This sort of system is not cheap--at least $1000. Your
water bill is high enough that you might actually be able
to get this system to pay for itself eventually.
Good luck,
Art

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