@ Sudsmaster
States didn't demand dishwasher products remove phosphates, reather it was the reaction of P&G and other makers of said products to what they saw coming down the pike.
According to the New York State bill (see link posted elsewhere on this forum), at the time the state banned phosphates for home laundry products, automatic dishwashers escaped such action because in part so few homes had them back then. However today automatic dishwashers aren't really a "luxury" or high end item, and most homes have them, this has driven up the use of detergents.
Like California, there are a few states with large enough consmer populations that when one acts, sooner or later it trickles down. Besides the original other sixteen states that have banned phosphates in dw detergent, NY has joined and NJ is close to having it's name added as well.
Years ago detergent makers would have said "fine", we will product products for different regions and that will be that. However the nature of the business has changed, with manufacturing now concentrated in several or just a few plants, who in turn pump out proudcts for the entire country, if not North America.
Time will tell if P&G has stopped producing phosphate versions of all domestic dishwasher detergents. If the supply of same dries up even in non-banned areas as excess supply is absorbed (ok, hoarded, *LOL*), and not replaced, there will be our answer.
Comparing Germany to the United States isn't fair. IIRC, one body controls what can and cannot go into products in the former, whereas the later has fifty sovereign states,free to make their own decisions in this matter.
Know we have gone toe to toe on this before, but methinks part of this push to get shot of phosphates is the federal government leaning on states and local areas to "clean up" their drinking water supplies and waterways. New York City narrowly escaped having to build new water treatment plants (at a cost of many millions), by agreeing to certain federal requests.
It is perfectly possible to filter out more phosphates than most local treatment plants do now, but that comes at a cost of building new or retro-fitting existing plants. Most state and local governments barely have funds for road infrastructure projects, so you can imagine the howls of protest about anything else.