Phosphorus is an essential plant nutrient. It became problematic in the 50's and 60's when widely used in detergents.

*****
A DEAD LAKE
WAKES UPTHE PUBLIC
Natural fresh surface water undergoes an aging
process called eutrophication (eutrophic: from
Greek and German meaning wellfed).The process
is associated with increased aquatic plant and
algae growth, high nutrient content, a reduction
in water clarity, and decreased dissolved oxygen
content. Increased biological activity ultimately
results in sedimentation as dead and decaying
plant debris sinks and accumulates on the bottom
of the lake or pond. In essence,surface water is
transformed into a bog. Excessive inputs of P
accelerate the eutrophication process of lakes.
By the end of the 1960s, a serious decline in
water quality was documented for many major
bodies of surface water, especially water adjacent
to heavily populated areas of the eastern United
States.

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http://64.233.169.104/search?q=cache:rIikvefe8I4J:turf.lib.msu.edu/2000s/2005/050701.pdf+phosphorous+soap+and+plants&hl=en&ct=clnk&cd=9&gl=us&client=firefox-a


I don't really know how phosphorus in soap could be organic, but I think it's a matter of why you are concerned about it being so. If your concern is primarily health and safety, then I would much more concerned about other chemicals in commercial soaps and take advantage of the benefits of any phosphorus present. If it's a certification issue (wanting to be certifies to sell organic produce) I have no idea what the official stance would be. Though I would be very interested in hearing if anyone knows.

Here's a pretty good article that includes info on choosing greywater-compatible soaps and detergents:

www.harvestingrainwater.com/grey...ents/

good point... if you use a disgusting bucket to collect your gray water such as the same one you used to clean your floors or windows, or such... get a nice new one.....
...im glad i saw this post... i was going to ask about it on another tribe... good to know stuff...

....json

a good question....lived in missoula, mt for a time....EkoCompost, a local company, makes compost w/ the city's sewage sludge...seen em spread out the tampon, condom infested blob myself....helluvan operation though....underground ventilation, leechate recirculation, monitoring wells.....would i use it in my garden roflmao....certain plants are very good at taking up certain nasties (corn and mercury)....dont care how hot you cook the compost...may kill pathogens but heavy metals, persistent bioaccumulative organic compounds, hormones, birthcontrol pills, so on so forth....no thank you....very seperate flower garden...sure...just might not want to work it or walk in it w/ bare skin....some things like lead can soak through pores....dilution is the solution to pollution lol....anyone got better ideas, i'm all ears....many rivers demand we do something yesterday....think how many toilets flush into the Gulf of Mexico every day.....