The misinformation on the subject of phosphates and laundry detergents is amazing.
For example, the eHOw website asserts:
"Modern laundry detergents no longer contain phosphates due to a ban passed in 1993.... Prior to the ban, laundry detergents frequently contained between 30 and 50 percent phosphate builders. Intense debate among environmentalists, detergent manufacturers, and government officials began in the 1960s, and Congress enacted a ban that effectively removed phosphates from laundry detergents in 1993. "
http://www.ehow.com/facts_6006821_detergent-high-phosphate-level_.html
In point of fact, as far as I have been able to determine, Congress has NEVER passed a national ban on phosphates in laundry detergents, period. Instead limits of phosphates are enacted on a state and local basis. This is why it's still perfectly legal to buy and use phosphated laundry detergents in arid states like California, Nevada, Arizona, etc, where the primary water pollutant of concern is nitrates, not phosphates.
Now, the laundry detergent industry has voluntarily removed phosphates from just about every major brand of laundry detergents, with generally regrettable results. That it is now considering doing this for dishwasher detergents is even more regrettable, since the non-phosphated substitutes appear to be even less efficacious than non-phosphated laundry detergents are for cleaning fabrics.
I very much doubt that Congress would seriously consider banning phosphates in dishwasher detergents under these circumstances, especially in light of the fact that it has never banned them in laundry detergents. The detergent manufacturing industry, however, in its continuous corner cutting, no doubt will welcome the opportunity to voluntarily remove practically all phosphates from dishwasher detergents so that it doesn't have to package two different types. Of course, most of these same manufacturers seems to have absolutely no problem with offering a bewildering variety of dishwasher detergents anyway, with catchy names like "Complete", "Advanced", etc etc etc.
PURE BULLSH!T