
Thursday, January 21, 2010
Bottled Water is Not Wise

Friday, December 4, 2009
Wednesday, November 18, 2009
Our leaders should be leading
Monday, November 16, 2009
Write Up on Sheepless.org
Friday, November 13, 2009
Free Screening of Tapped
Pure Water Technologies are encouraging folks to join us for a free, yes
free, screening of Tapped at Ultra Star Cinema next Wednesday.
Tapped is a documentary about the bottled water industry and examines the
social, economic, and environmental impacts of bottled water. I get to see
a lot of films about water pollution and bottled water, but this is
definitely one of the best films I've seen on the subject.
The screening is next Wednesday, Nov. 18th at 7 pm if you are interested.
Please RSVP by emailing rsvptapped@gmail.com if you plan to attend the
screening. Please see the attached fliers for more info, and feel free to
forward this email to friends.
Thursday, November 12, 2009
Greywater Policy Position from: The Sustainability Alliance of Southern California
Dear Fellow Sustainability Advocates:
During our regular meeting on October 27, the Sustainability Alliance of Southern California adopted the following official policy position regarding graywater use in Southern California:
"It is the policy of the Sustainability Alliance of Southern California to promote maximum implementation of graywater systems in Southern California. We encourage all jurisdictions within Southern California to proactively support regulatory approval for graywater systems and that incentives, including cash rebates, sewage rate reductions, or reduction in water rates, be evaluated."
We are taking this position of support for graywater reuse for a number of reasons:
1) Simplest way to reclaim and reuse a valuable resource without expensive treatment and re-distribution.
2) Provides a readily available water source for irrigation of yards and greenbelts.
3) Conserves our most precious resource—fresh, potable water.
4) Cuts down on the amount of electricity needed to move water to and throughout our region.
5) Reduces the amount of wastewater that needs to be treated at publicly owned treatment works resulting in less effluent disposed of through ocean outfalls.
6) Less water treated translates to a reduction in related treatment costs and chemicals used in the treatment process.
Supporting this policy now makes sense because...
1) California is in a declared State of Emergency due to extended drought conditions and much needed, potable water is used to irrigate residential landscapes.
2) Statewide legislation supporting use of graywater was recently incorporated into existing building codes, 'opting in' every municipality for graywater use. To opt out, a municipality must hold a public hearing and show just cause for restricting or eliminating graywater use.
a) SB 1258 (which was signed into law in September 2008) directed the Housing and Community Development (HCD) agency to propose building standards for the construction, installation, and alteration of graywater systems for residential indoor and outdoor uses to the California Building Standards Commission (CBSC). Existing graywater standards contained in the California Code of Regulations, Title 24, California Plumbing Code, Part 5, Appendix G were based on requirements for private sewage disposal. These standards were found to be overly prescriptive and antiquated and not readily usable by people seeking to install graywater systems for the purpose of water conservation and reuse.
b) The emergency graywater regulations, which added Chapter 16A, Part I "Nonpotable Water Reuse Systems,” were approved by the CBSC on July 30, 2009. The emergency regulations were subsequently filed with the Secretary of State on August 4, 2009, effective immediately upon filing.
The two most significant changes in the new regulations:
1) Single Fixture Systems (such as clothes washers) no longer require a permit and
2) Irrigation lines no longer have to be buried 9 inches, but can simply be placed under 2 inches of mulch.
Wednesday, October 14, 2009
Irresponsible Greywater Reporting
Error: Use of grey water for irrigating lawns
The only proven safe and reliable way of irrigating lawns with grey water is through underground drip tubing supplied by a backwashing sand filter type system; far beyond what most residences are likely to install. Unfortunately, turf accounts for the bulk of the irrigation need in the typical landscape, and lawn grey watering is by far the most prevalent violation of common sense grey water safety rules.
This is awkward to write. Do I criminalize thousands of grey water users who see no harm in what they are doing, or do I condone a marginal activity?
If the lawn receives traffic, by applying grey water to the surface you are short circuiting the all-important purification step (see health rulespages 4, 8), inviting direct contact with untreated grey water and the possibility of transmitting pathogens. The likelihood of transmitting disease is small (it would be laughed off in most developing countries) but it exists. The nightmare scenario: the day care center that "saves money and the environment" by irrigating the lawn with diaper wash water, which a dozen toddlers from other families then play in (I know you think I'm making this up, but I saw it at my daughter's very highly regarded day care; they were just trying to do the right thing and spaced out a bit about the context).
If the lawn doesn't receive traffic, then it is less risky to irrigate it with grey water but it shouldn't be a lawn in the first place; the only legitimate reason to have one of these resource hogs is that they are more fun to play on than, say, a gravel and cactus garden. A better solution would be to replace the un-trafficked lawn with something else and irrigate that with grey water, if it needs irrigation at all.
Besides the health issue, grey watering a lawn is a pain in the rear. The system almost universally used is a hose from the washing machine or house plumbing which is moved around. Since the water has to be applied within the root system to benefit the plant, you have to move this hose to numerous locations in a very small grid, as compared to say, a large fruit tree, which would benefit from water left to dump anywhere within an area of hundreds of square feet.
Perforated pipe under the lawn will have efficiency in the single digits, and leave some areas completely dry.
Preferred practice
We suggest that you replace most of your turf with something else, replace what's left with a water-conserving grass such as Tall Fescue, watered with the freshwater you save from using grey water elsewhere, or just let your lawn go dormant when there's not enough rain to sustain it.
Exceptions
Lawns can be irrigated well and safely through subsurface drip ($1500 on up. 300 gpd grey water generation/irrigation need is the break even point where such a system starts to make sense).